diff --git a/server/controllers/api/search.ts b/server/controllers/api/search.ts
index ef0f4285d..a3b66b2a6 100644
--- a/server/controllers/api/search.ts
+++ b/server/controllers/api/search.ts
@@ -14,8 +14,7 @@ import { VideoChannelsSearchQuery, VideosSearchQuery } from '../../../shared/mod
 import { buildNSFWFilter, isUserAbleToSearchRemoteURI } from '../../helpers/express-utils'
 import { logger } from '../../helpers/logger'
 import { getFormattedObjects } from '../../helpers/utils'
-import { loadActorUrlOrGetFromWebfinger } from '../../helpers/webfinger'
-import { getOrCreateAPActor } from '../../lib/activitypub/actors'
+import { getOrCreateAPActor, loadActorUrlOrGetFromWebfinger } from '../../lib/activitypub/actors'
 import {
   asyncMiddleware,
   commonVideosFiltersValidator,
diff --git a/server/helpers/custom-validators/video-comments.ts b/server/helpers/custom-validators/video-comments.ts
index 5c88447ad..94bdf237a 100644
--- a/server/helpers/custom-validators/video-comments.ts
+++ b/server/helpers/custom-validators/video-comments.ts
@@ -1,9 +1,5 @@
-import * as express from 'express'
 import validator from 'validator'
-import { VideoCommentModel } from '@server/models/video/video-comment'
 import { CONSTRAINTS_FIELDS } from '../../initializers/constants'
-import { MVideoId } from '@server/types/models'
-import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const VIDEO_COMMENTS_CONSTRAINTS_FIELDS = CONSTRAINTS_FIELDS.VIDEO_COMMENTS
 
@@ -11,74 +7,8 @@ function isValidVideoCommentText (value: string) {
   return value === null || validator.isLength(value, VIDEO_COMMENTS_CONSTRAINTS_FIELDS.TEXT)
 }
 
-async function doesVideoCommentThreadExist (idArg: number | string, video: MVideoId, res: express.Response) {
-  const id = parseInt(idArg + '', 10)
-  const videoComment = await VideoCommentModel.loadById(id)
-
-  if (!videoComment) {
-    res.fail({
-      status: HttpStatusCode.NOT_FOUND_404,
-      message: 'Video comment thread not found'
-    })
-    return false
-  }
-
-  if (videoComment.videoId !== video.id) {
-    res.fail({ message: 'Video comment is not associated to this video.' })
-    return false
-  }
-
-  if (videoComment.inReplyToCommentId !== null) {
-    res.fail({ message: 'Video comment is not a thread.' })
-    return false
-  }
-
-  res.locals.videoCommentThread = videoComment
-  return true
-}
-
-async function doesVideoCommentExist (idArg: number | string, video: MVideoId, res: express.Response) {
-  const id = parseInt(idArg + '', 10)
-  const videoComment = await VideoCommentModel.loadByIdAndPopulateVideoAndAccountAndReply(id)
-
-  if (!videoComment) {
-    res.fail({
-      status: HttpStatusCode.NOT_FOUND_404,
-      message: 'Video comment thread not found'
-    })
-    return false
-  }
-
-  if (videoComment.videoId !== video.id) {
-    res.fail({ message: 'Video comment is not associated to this video.' })
-    return false
-  }
-
-  res.locals.videoCommentFull = videoComment
-  return true
-}
-
-async function doesCommentIdExist (idArg: number | string, res: express.Response) {
-  const id = parseInt(idArg + '', 10)
-  const videoComment = await VideoCommentModel.loadByIdAndPopulateVideoAndAccountAndReply(id)
-
-  if (!videoComment) {
-    res.fail({
-      status: HttpStatusCode.NOT_FOUND_404,
-      message: 'Video comment thread not found'
-    })
-    return false
-  }
-
-  res.locals.videoCommentFull = videoComment
-  return true
-}
-
 // ---------------------------------------------------------------------------
 
 export {
-  isValidVideoCommentText,
-  doesVideoCommentThreadExist,
-  doesVideoCommentExist,
-  doesCommentIdExist
+  isValidVideoCommentText
 }
diff --git a/server/helpers/custom-validators/video-imports.ts b/server/helpers/custom-validators/video-imports.ts
index 3ad7a4648..dbf6a3504 100644
--- a/server/helpers/custom-validators/video-imports.ts
+++ b/server/helpers/custom-validators/video-imports.ts
@@ -2,9 +2,6 @@ import 'multer'
 import validator from 'validator'
 import { CONSTRAINTS_FIELDS, MIMETYPES, VIDEO_IMPORT_STATES } from '../../initializers/constants'
 import { exists, isFileValid } from './misc'
-import * as express from 'express'
-import { VideoImportModel } from '../../models/video/video-import'
-import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 function isVideoImportTargetUrlValid (url: string) {
   const isURLOptions = {
@@ -32,26 +29,10 @@ function isVideoImportTorrentFile (files: { [ fieldname: string ]: Express.Multe
   return isFileValid(files, videoTorrentImportRegex, 'torrentfile', CONSTRAINTS_FIELDS.VIDEO_IMPORTS.TORRENT_FILE.FILE_SIZE.max, true)
 }
 
-async function doesVideoImportExist (id: number, res: express.Response) {
-  const videoImport = await VideoImportModel.loadAndPopulateVideo(id)
-
-  if (!videoImport) {
-    res.fail({
-      status: HttpStatusCode.NOT_FOUND_404,
-      message: 'Video import not found'
-    })
-    return false
-  }
-
-  res.locals.videoImport = videoImport
-  return true
-}
-
 // ---------------------------------------------------------------------------
 
 export {
   isVideoImportStateValid,
   isVideoImportTargetUrlValid,
-  doesVideoImportExist,
   isVideoImportTorrentFile
 }
diff --git a/server/helpers/custom-validators/video-ownership.ts b/server/helpers/custom-validators/video-ownership.ts
index 21a6b7203..0e1c63bad 100644
--- a/server/helpers/custom-validators/video-ownership.ts
+++ b/server/helpers/custom-validators/video-ownership.ts
@@ -1,26 +1,9 @@
 import { Response } from 'express'
-import { VideoChangeOwnershipModel } from '../../models/video/video-change-ownership'
-import { MVideoChangeOwnershipFull } from '@server/types/models/video/video-change-ownership'
 import { MUserId } from '@server/types/models'
+import { MVideoChangeOwnershipFull } from '@server/types/models/video/video-change-ownership'
 import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
-export async function doesChangeVideoOwnershipExist (idArg: number | string, res: Response) {
-  const id = parseInt(idArg + '', 10)
-  const videoChangeOwnership = await VideoChangeOwnershipModel.load(id)
-
-  if (!videoChangeOwnership) {
-    res.fail({
-      status: HttpStatusCode.NOT_FOUND_404,
-      message: 'Video change ownership not found'
-    })
-    return false
-  }
-
-  res.locals.videoChangeOwnership = videoChangeOwnership
-  return true
-}
-
-export function checkUserCanTerminateOwnershipChange (user: MUserId, videoChangeOwnership: MVideoChangeOwnershipFull, res: Response) {
+function checkUserCanTerminateOwnershipChange (user: MUserId, videoChangeOwnership: MVideoChangeOwnershipFull, res: Response) {
   if (videoChangeOwnership.NextOwner.userId === user.id) {
     return true
   }
@@ -31,3 +14,7 @@ export function checkUserCanTerminateOwnershipChange (user: MUserId, videoChange
   })
   return false
 }
+
+export {
+  checkUserCanTerminateOwnershipChange
+}
diff --git a/server/helpers/video.ts b/server/helpers/video.ts
index 7c510f474..d3445bed5 100644
--- a/server/helpers/video.ts
+++ b/server/helpers/video.ts
@@ -1,66 +1,7 @@
 import { Response } from 'express'
 import { CONFIG } from '@server/initializers/config'
-import {
-  isStreamingPlaylist,
-  MStreamingPlaylistVideo,
-  MVideo,
-  MVideoAccountLightBlacklistAllFiles,
-  MVideoFullLight,
-  MVideoIdThumbnail,
-  MVideoImmutable,
-  MVideoThumbnail,
-  MVideoWithRights
-} from '@server/types/models'
+import { isStreamingPlaylist, MStreamingPlaylistVideo, MVideo } from '@server/types/models'
 import { VideoPrivacy, VideoState } from '@shared/models'
-import { VideoModel } from '../models/video/video'
-
-type VideoFetchType = 'all' | 'only-video' | 'only-video-with-rights' | 'id' | 'none' | 'only-immutable-attributes'
-
-function fetchVideo (id: number | string, fetchType: 'all', userId?: number): Promise<MVideoFullLight>
-function fetchVideo (id: number | string, fetchType: 'only-immutable-attributes'): Promise<MVideoImmutable>
-function fetchVideo (id: number | string, fetchType: 'only-video', userId?: number): Promise<MVideoThumbnail>
-function fetchVideo (id: number | string, fetchType: 'only-video-with-rights', userId?: number): Promise<MVideoWithRights>
-function fetchVideo (id: number | string, fetchType: 'id' | 'none', userId?: number): Promise<MVideoIdThumbnail>
-function fetchVideo (
-  id: number | string,
-  fetchType: VideoFetchType,
-  userId?: number
-): Promise<MVideoFullLight | MVideoThumbnail | MVideoWithRights | MVideoIdThumbnail | MVideoImmutable>
-function fetchVideo (
-  id: number | string,
-  fetchType: VideoFetchType,
-  userId?: number
-): Promise<MVideoFullLight | MVideoThumbnail | MVideoWithRights | MVideoIdThumbnail | MVideoImmutable> {
-  if (fetchType === 'all') return VideoModel.loadAndPopulateAccountAndServerAndTags(id, undefined, userId)
-
-  if (fetchType === 'only-immutable-attributes') return VideoModel.loadImmutableAttributes(id)
-
-  if (fetchType === 'only-video-with-rights') return VideoModel.loadWithRights(id)
-
-  if (fetchType === 'only-video') return VideoModel.load(id)
-
-  if (fetchType === 'id' || fetchType === 'none') return VideoModel.loadOnlyId(id)
-}
-
-type VideoFetchByUrlType = 'all' | 'only-video' | 'only-immutable-attributes'
-
-function fetchVideoByUrl (url: string, fetchType: 'all'): Promise<MVideoAccountLightBlacklistAllFiles>
-function fetchVideoByUrl (url: string, fetchType: 'only-immutable-attributes'): Promise<MVideoImmutable>
-function fetchVideoByUrl (url: string, fetchType: 'only-video'): Promise<MVideoThumbnail>
-function fetchVideoByUrl (
-  url: string,
-  fetchType: VideoFetchByUrlType
-): Promise<MVideoAccountLightBlacklistAllFiles | MVideoThumbnail | MVideoImmutable>
-function fetchVideoByUrl (
-  url: string,
-  fetchType: VideoFetchByUrlType
-): Promise<MVideoAccountLightBlacklistAllFiles | MVideoThumbnail | MVideoImmutable> {
-  if (fetchType === 'all') return VideoModel.loadByUrlAndPopulateAccount(url)
-
-  if (fetchType === 'only-immutable-attributes') return VideoModel.loadByUrlImmutableAttributes(url)
-
-  if (fetchType === 'only-video') return VideoModel.loadByUrl(url)
-}
 
 function getVideoWithAttributes (res: Response) {
   return res.locals.videoAll || res.locals.onlyVideo || res.locals.onlyVideoWithRights
@@ -100,11 +41,7 @@ function getExtFromMimetype (mimeTypes: { [id: string]: string | string[] }, mim
 }
 
 export {
-  VideoFetchType,
-  VideoFetchByUrlType,
-  fetchVideo,
   getVideoWithAttributes,
-  fetchVideoByUrl,
   extractVideo,
   getExtFromMimetype,
   isStateForFederation,
diff --git a/server/lib/activitypub/actors/get.ts b/server/lib/activitypub/actors/get.ts
index 0d5bea789..e7e87a967 100644
--- a/server/lib/activitypub/actors/get.ts
+++ b/server/lib/activitypub/actors/get.ts
@@ -1,9 +1,9 @@
 
 import { checkUrlsSameHost, getAPId } from '@server/helpers/activitypub'
-import { ActorFetchByUrlType, fetchActorByUrl } from '@server/helpers/actor'
 import { retryTransactionWrapper } from '@server/helpers/database-utils'
 import { logger } from '@server/helpers/logger'
 import { JobQueue } from '@server/lib/job-queue'
+import { ActorFetchByUrlType, fetchActorByUrl } from '@server/lib/model-loaders'
 import { MActor, MActorAccountChannelId, MActorAccountChannelIdActor, MActorAccountId, MActorFullActor } from '@server/types/models'
 import { ActivityPubActor } from '@shared/models'
 import { refreshActorIfNeeded } from './refresh'
diff --git a/server/lib/activitypub/actors/index.ts b/server/lib/activitypub/actors/index.ts
index a54da6798..5ee2a6f1a 100644
--- a/server/lib/activitypub/actors/index.ts
+++ b/server/lib/activitypub/actors/index.ts
@@ -3,3 +3,4 @@ export * from './image'
 export * from './keys'
 export * from './refresh'
 export * from './updater'
+export * from './webfinger'
diff --git a/server/lib/activitypub/actors/refresh.ts b/server/lib/activitypub/actors/refresh.ts
index ff3b249d0..9f2289bfa 100644
--- a/server/lib/activitypub/actors/refresh.ts
+++ b/server/lib/activitypub/actors/refresh.ts
@@ -1,12 +1,12 @@
-import { ActorFetchByUrlType } from '@server/helpers/actor'
 import { logger } from '@server/helpers/logger'
 import { PeerTubeRequestError } from '@server/helpers/requests'
-import { getUrlFromWebfinger } from '@server/helpers/webfinger'
+import { ActorFetchByUrlType } from '@server/lib/model-loaders'
 import { ActorModel } from '@server/models/actor/actor'
 import { MActorAccountChannelId, MActorFull } from '@server/types/models'
 import { HttpStatusCode } from '@shared/core-utils'
 import { fetchRemoteActor } from './shared'
 import { APActorUpdater } from './updater'
+import { getUrlFromWebfinger } from './webfinger'
 
 async function refreshActorIfNeeded <T extends MActorFull | MActorAccountChannelId> (
   actorArg: T,
diff --git a/server/lib/activitypub/actors/shared/index.ts b/server/lib/activitypub/actors/shared/index.ts
index a2ff468cf..52af1a8e1 100644
--- a/server/lib/activitypub/actors/shared/index.ts
+++ b/server/lib/activitypub/actors/shared/index.ts
@@ -1,3 +1,3 @@
 export * from './creator'
-export * from './url-to-object'
 export * from './object-to-model-attributes'
+export * from './url-to-object'
diff --git a/server/helpers/webfinger.ts b/server/lib/activitypub/actors/webfinger.ts
similarity index 82%
rename from server/helpers/webfinger.ts
rename to server/lib/activitypub/actors/webfinger.ts
index 33367f651..cf8eddfc7 100644
--- a/server/helpers/webfinger.ts
+++ b/server/lib/activitypub/actors/webfinger.ts
@@ -1,10 +1,10 @@
 import * as WebFinger from 'webfinger.js'
-import { WebFingerData } from '../../shared'
-import { WEBSERVER } from '../initializers/constants'
-import { ActorModel } from '../models/actor/actor'
-import { MActorFull } from '../types/models'
-import { isTestInstance } from './core-utils'
-import { isActivityPubUrlValid } from './custom-validators/activitypub/misc'
+import { isTestInstance } from '@server/helpers/core-utils'
+import { isActivityPubUrlValid } from '@server/helpers/custom-validators/activitypub/misc'
+import { WEBSERVER } from '@server/initializers/constants'
+import { ActorModel } from '@server/models/actor/actor'
+import { MActorFull } from '@server/types/models'
+import { WebFingerData } from '@shared/models'
 
 const webfinger = new WebFinger({
   webfist_fallback: false,
diff --git a/server/lib/activitypub/videos/get.ts b/server/lib/activitypub/videos/get.ts
index a8c41e178..38ba4978c 100644
--- a/server/lib/activitypub/videos/get.ts
+++ b/server/lib/activitypub/videos/get.ts
@@ -1,7 +1,7 @@
 import { getAPId } from '@server/helpers/activitypub'
 import { retryTransactionWrapper } from '@server/helpers/database-utils'
-import { fetchVideoByUrl, VideoFetchByUrlType } from '@server/helpers/video'
 import { JobQueue } from '@server/lib/job-queue'
+import { fetchVideoByUrl, VideoFetchByUrlType } from '@server/lib/model-loaders'
 import { MVideoAccountLightBlacklistAllFiles, MVideoImmutable, MVideoThumbnail } from '@server/types/models'
 import { refreshVideoIfNeeded } from './refresh'
 import { APVideoCreator, fetchRemoteVideo, SyncParam, syncVideoExternalAttributes } from './shared'
diff --git a/server/lib/activitypub/videos/refresh.ts b/server/lib/activitypub/videos/refresh.ts
index 71a4e75b0..f1a3a6fac 100644
--- a/server/lib/activitypub/videos/refresh.ts
+++ b/server/lib/activitypub/videos/refresh.ts
@@ -1,7 +1,7 @@
 import { logger, loggerTagsFactory } from '@server/helpers/logger'
 import { PeerTubeRequestError } from '@server/helpers/requests'
-import { VideoFetchByUrlType } from '@server/helpers/video'
 import { ActorFollowScoreCache } from '@server/lib/files-cache'
+import { VideoFetchByUrlType } from '@server/lib/model-loaders'
 import { VideoModel } from '@server/models/video/video'
 import { MVideoAccountLightBlacklistAllFiles, MVideoThumbnail } from '@server/types/models'
 import { HttpStatusCode } from '@shared/core-utils'
diff --git a/server/lib/job-queue/handlers/activitypub-follow.ts b/server/lib/job-queue/handlers/activitypub-follow.ts
index 76b6fcaae..f896d7af4 100644
--- a/server/lib/job-queue/handlers/activitypub-follow.ts
+++ b/server/lib/job-queue/handlers/activitypub-follow.ts
@@ -4,13 +4,12 @@ import { ActivitypubFollowPayload } from '@shared/models'
 import { sanitizeHost } from '../../../helpers/core-utils'
 import { retryTransactionWrapper } from '../../../helpers/database-utils'
 import { logger } from '../../../helpers/logger'
-import { loadActorUrlOrGetFromWebfinger } from '../../../helpers/webfinger'
 import { REMOTE_SCHEME, WEBSERVER } from '../../../initializers/constants'
 import { sequelizeTypescript } from '../../../initializers/database'
 import { ActorModel } from '../../../models/actor/actor'
 import { ActorFollowModel } from '../../../models/actor/actor-follow'
 import { MActor, MActorFollowActors, MActorFull } from '../../../types/models'
-import { getOrCreateAPActor } from '../../activitypub/actors'
+import { getOrCreateAPActor, loadActorUrlOrGetFromWebfinger } from '../../activitypub/actors'
 import { sendFollow } from '../../activitypub/send'
 import { Notifier } from '../../notifier'
 
diff --git a/server/lib/job-queue/handlers/activitypub-refresher.ts b/server/lib/job-queue/handlers/activitypub-refresher.ts
index 29483f310..2508a4793 100644
--- a/server/lib/job-queue/handlers/activitypub-refresher.ts
+++ b/server/lib/job-queue/handlers/activitypub-refresher.ts
@@ -1,9 +1,9 @@
 import * as Bull from 'bull'
 import { refreshVideoPlaylistIfNeeded } from '@server/lib/activitypub/playlists'
 import { refreshVideoIfNeeded } from '@server/lib/activitypub/videos'
+import { fetchVideoByUrl } from '@server/lib/model-loaders'
 import { RefreshPayload } from '@shared/models'
 import { logger } from '../../../helpers/logger'
-import { fetchVideoByUrl } from '../../../helpers/video'
 import { ActorModel } from '../../../models/actor/actor'
 import { VideoPlaylistModel } from '../../../models/video/video-playlist'
 import { refreshActorIfNeeded } from '../../activitypub/actors'
diff --git a/server/helpers/actor.ts b/server/lib/model-loaders/actor.ts
similarity index 75%
rename from server/helpers/actor.ts
rename to server/lib/model-loaders/actor.ts
index 5f742505b..234cb344f 100644
--- a/server/helpers/actor.ts
+++ b/server/lib/model-loaders/actor.ts
@@ -1,6 +1,6 @@
 
-import { ActorModel } from '../models/actor/actor'
-import { MActorAccountChannelId, MActorFull } from '../types/models'
+import { ActorModel } from '../../models/actor/actor'
+import { MActorAccountChannelId, MActorFull } from '../../types/models'
 
 type ActorFetchByUrlType = 'all' | 'association-ids'
 
diff --git a/server/lib/model-loaders/index.ts b/server/lib/model-loaders/index.ts
new file mode 100644
index 000000000..9e5152cb2
--- /dev/null
+++ b/server/lib/model-loaders/index.ts
@@ -0,0 +1,2 @@
+export * from './actor'
+export * from './video'
diff --git a/server/lib/model-loaders/video.ts b/server/lib/model-loaders/video.ts
new file mode 100644
index 000000000..7aaf00e89
--- /dev/null
+++ b/server/lib/model-loaders/video.ts
@@ -0,0 +1,64 @@
+import { VideoModel } from '@server/models/video/video'
+import {
+  MVideoAccountLightBlacklistAllFiles,
+  MVideoFullLight,
+  MVideoIdThumbnail,
+  MVideoImmutable,
+  MVideoThumbnail,
+  MVideoWithRights
+} from '@server/types/models'
+
+type VideoFetchType = 'all' | 'only-video' | 'only-video-with-rights' | 'id' | 'none' | 'only-immutable-attributes'
+
+function fetchVideo (id: number | string, fetchType: 'all', userId?: number): Promise<MVideoFullLight>
+function fetchVideo (id: number | string, fetchType: 'only-immutable-attributes'): Promise<MVideoImmutable>
+function fetchVideo (id: number | string, fetchType: 'only-video', userId?: number): Promise<MVideoThumbnail>
+function fetchVideo (id: number | string, fetchType: 'only-video-with-rights', userId?: number): Promise<MVideoWithRights>
+function fetchVideo (id: number | string, fetchType: 'id' | 'none', userId?: number): Promise<MVideoIdThumbnail>
+function fetchVideo (
+  id: number | string,
+  fetchType: VideoFetchType,
+  userId?: number
+): Promise<MVideoFullLight | MVideoThumbnail | MVideoWithRights | MVideoIdThumbnail | MVideoImmutable>
+function fetchVideo (
+  id: number | string,
+  fetchType: VideoFetchType,
+  userId?: number
+): Promise<MVideoFullLight | MVideoThumbnail | MVideoWithRights | MVideoIdThumbnail | MVideoImmutable> {
+  if (fetchType === 'all') return VideoModel.loadAndPopulateAccountAndServerAndTags(id, undefined, userId)
+
+  if (fetchType === 'only-immutable-attributes') return VideoModel.loadImmutableAttributes(id)
+
+  if (fetchType === 'only-video-with-rights') return VideoModel.loadWithRights(id)
+
+  if (fetchType === 'only-video') return VideoModel.load(id)
+
+  if (fetchType === 'id' || fetchType === 'none') return VideoModel.loadOnlyId(id)
+}
+
+type VideoFetchByUrlType = 'all' | 'only-video' | 'only-immutable-attributes'
+
+function fetchVideoByUrl (url: string, fetchType: 'all'): Promise<MVideoAccountLightBlacklistAllFiles>
+function fetchVideoByUrl (url: string, fetchType: 'only-immutable-attributes'): Promise<MVideoImmutable>
+function fetchVideoByUrl (url: string, fetchType: 'only-video'): Promise<MVideoThumbnail>
+function fetchVideoByUrl (
+  url: string,
+  fetchType: VideoFetchByUrlType
+): Promise<MVideoAccountLightBlacklistAllFiles | MVideoThumbnail | MVideoImmutable>
+function fetchVideoByUrl (
+  url: string,
+  fetchType: VideoFetchByUrlType
+): Promise<MVideoAccountLightBlacklistAllFiles | MVideoThumbnail | MVideoImmutable> {
+  if (fetchType === 'all') return VideoModel.loadByUrlAndPopulateAccount(url)
+
+  if (fetchType === 'only-immutable-attributes') return VideoModel.loadByUrlImmutableAttributes(url)
+
+  if (fetchType === 'only-video') return VideoModel.loadByUrl(url)
+}
+
+export {
+  VideoFetchType,
+  VideoFetchByUrlType,
+  fetchVideo,
+  fetchVideoByUrl
+}
diff --git a/server/lib/server-config-manager.ts b/server/lib/server-config-manager.ts
index 25a770c6b..80d87a9d3 100644
--- a/server/lib/server-config-manager.ts
+++ b/server/lib/server-config-manager.ts
@@ -1,7 +1,7 @@
-import { isSignupAllowed, isSignupAllowedForCurrentIP } from '@server/helpers/signup'
 import { getServerCommit } from '@server/helpers/utils'
 import { CONFIG, isEmailEnabled } from '@server/initializers/config'
 import { CONSTRAINTS_FIELDS, DEFAULT_THEME_NAME, PEERTUBE_VERSION } from '@server/initializers/constants'
+import { isSignupAllowed, isSignupAllowedForCurrentIP } from '@server/lib/signup'
 import { ActorCustomPageModel } from '@server/models/account/actor-custom-page'
 import { HTMLServerConfig, RegisteredExternalAuthConfig, RegisteredIdAndPassAuthConfig, ServerConfig } from '@shared/models'
 import { Hooks } from './plugins/hooks'
diff --git a/server/helpers/signup.ts b/server/lib/signup.ts
similarity index 100%
rename from server/helpers/signup.ts
rename to server/lib/signup.ts
diff --git a/server/middlewares/activitypub.ts b/server/middlewares/activitypub.ts
index a1fdfafcf..6b43b7764 100644
--- a/server/middlewares/activitypub.ts
+++ b/server/middlewares/activitypub.ts
@@ -1,13 +1,12 @@
 import { NextFunction, Request, Response } from 'express'
+import { getAPId } from '@server/helpers/activitypub'
+import { isActorDeleteActivityValid } from '@server/helpers/custom-validators/activitypub/actor'
 import { ActivityDelete, ActivityPubSignature } from '../../shared'
+import { HttpStatusCode } from '../../shared/core-utils/miscs/http-error-codes'
 import { logger } from '../helpers/logger'
 import { isHTTPSignatureVerified, isJsonLDSignatureVerified, parseHTTPSignature } from '../helpers/peertube-crypto'
 import { ACCEPT_HEADERS, ACTIVITY_PUB, HTTP_SIGNATURE } from '../initializers/constants'
-import { getOrCreateAPActor } from '../lib/activitypub/actors'
-import { loadActorUrlOrGetFromWebfinger } from '../helpers/webfinger'
-import { isActorDeleteActivityValid } from '@server/helpers/custom-validators/activitypub/actor'
-import { getAPId } from '@server/helpers/activitypub'
-import { HttpStatusCode } from '../../shared/core-utils/miscs/http-error-codes'
+import { getOrCreateAPActor, loadActorUrlOrGetFromWebfinger } from '../lib/activitypub/actors'
 
 async function checkSignature (req: Request, res: Response, next: NextFunction) {
   try {
diff --git a/server/middlewares/validators/abuse.ts b/server/middlewares/validators/abuse.ts
index 7f002e0d5..56c97747c 100644
--- a/server/middlewares/validators/abuse.ts
+++ b/server/middlewares/validators/abuse.ts
@@ -13,13 +13,11 @@ import {
   isAbuseVideoIsValid
 } from '@server/helpers/custom-validators/abuses'
 import { exists, isIdOrUUIDValid, isIdValid, toIntOrNull } from '@server/helpers/custom-validators/misc'
-import { doesCommentIdExist } from '@server/helpers/custom-validators/video-comments'
 import { logger } from '@server/helpers/logger'
-import { doesAbuseExist, doesAccountIdExist, doesVideoExist } from '@server/helpers/middlewares'
 import { AbuseMessageModel } from '@server/models/abuse/abuse-message'
 import { AbuseCreate, UserRight } from '@shared/models'
-import { areValidationErrors } from './utils'
 import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
+import { areValidationErrors, doesAbuseExist, doesAccountIdExist, doesCommentIdExist, doesVideoExist } from './shared'
 
 const abuseReportValidator = [
   body('account.id')
diff --git a/server/middlewares/validators/account.ts b/server/middlewares/validators/account.ts
index cbdcef2fd..599eb10bb 100644
--- a/server/middlewares/validators/account.ts
+++ b/server/middlewares/validators/account.ts
@@ -2,8 +2,7 @@ import * as express from 'express'
 import { param } from 'express-validator'
 import { isAccountNameValid } from '../../helpers/custom-validators/accounts'
 import { logger } from '../../helpers/logger'
-import { areValidationErrors } from './utils'
-import { doesAccountNameWithHostExist, doesLocalAccountNameExist } from '../../helpers/middlewares'
+import { areValidationErrors, doesAccountNameWithHostExist, doesLocalAccountNameExist } from './shared'
 
 const localAccountValidator = [
   param('name').custom(isAccountNameValid).withMessage('Should have a valid account name'),
diff --git a/server/middlewares/validators/activitypub/pagination.ts b/server/middlewares/validators/activitypub/pagination.ts
index fa21f063d..c8ec34eb6 100644
--- a/server/middlewares/validators/activitypub/pagination.ts
+++ b/server/middlewares/validators/activitypub/pagination.ts
@@ -1,8 +1,8 @@
 import * as express from 'express'
 import { query } from 'express-validator'
-import { logger } from '../../../helpers/logger'
-import { areValidationErrors } from '../utils'
 import { PAGINATION } from '@server/initializers/constants'
+import { logger } from '../../../helpers/logger'
+import { areValidationErrors } from '../shared'
 
 const apPaginationValidator = [
   query('page')
diff --git a/server/middlewares/validators/activitypub/signature.ts b/server/middlewares/validators/activitypub/signature.ts
index 7896a6128..f2f7d5848 100644
--- a/server/middlewares/validators/activitypub/signature.ts
+++ b/server/middlewares/validators/activitypub/signature.ts
@@ -1,12 +1,13 @@
 import * as express from 'express'
 import { body } from 'express-validator'
 import {
-  isSignatureCreatorValid, isSignatureTypeValid,
+  isSignatureCreatorValid,
+  isSignatureTypeValid,
   isSignatureValueValid
 } from '../../../helpers/custom-validators/activitypub/signature'
 import { isDateValid } from '../../../helpers/custom-validators/misc'
 import { logger } from '../../../helpers/logger'
-import { areValidationErrors } from '../utils'
+import { areValidationErrors } from '../shared'
 
 const signatureValidator = [
   body('signature.type')
diff --git a/server/middlewares/validators/actor-image.ts b/server/middlewares/validators/actor-image.ts
index 961d7a7e5..49daadd61 100644
--- a/server/middlewares/validators/actor-image.ts
+++ b/server/middlewares/validators/actor-image.ts
@@ -4,7 +4,7 @@ import { isActorImageFile } from '@server/helpers/custom-validators/actor-images
 import { cleanUpReqFiles } from '../../helpers/express-utils'
 import { logger } from '../../helpers/logger'
 import { CONSTRAINTS_FIELDS } from '../../initializers/constants'
-import { areValidationErrors } from './utils'
+import { areValidationErrors } from './shared'
 
 const updateActorImageValidatorFactory = (fieldname: string) => ([
   body(fieldname).custom((value, { req }) => isActorImageFile(req.files, fieldname)).withMessage(
diff --git a/server/middlewares/validators/blocklist.ts b/server/middlewares/validators/blocklist.ts
index 125ff882c..826b16fc8 100644
--- a/server/middlewares/validators/blocklist.ts
+++ b/server/middlewares/validators/blocklist.ts
@@ -1,15 +1,14 @@
-import { body, param } from 'express-validator'
 import * as express from 'express'
-import { logger } from '../../helpers/logger'
-import { areValidationErrors } from './utils'
-import { AccountBlocklistModel } from '../../models/account/account-blocklist'
-import { isHostValid } from '../../helpers/custom-validators/servers'
-import { ServerBlocklistModel } from '../../models/server/server-blocklist'
-import { ServerModel } from '../../models/server/server'
-import { WEBSERVER } from '../../initializers/constants'
-import { doesAccountNameWithHostExist } from '../../helpers/middlewares'
+import { body, param } from 'express-validator'
 import { getServerActor } from '@server/models/application/application'
 import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
+import { isHostValid } from '../../helpers/custom-validators/servers'
+import { logger } from '../../helpers/logger'
+import { WEBSERVER } from '../../initializers/constants'
+import { AccountBlocklistModel } from '../../models/account/account-blocklist'
+import { ServerModel } from '../../models/server/server'
+import { ServerBlocklistModel } from '../../models/server/server-blocklist'
+import { areValidationErrors, doesAccountNameWithHostExist } from './shared'
 
 const blockAccountValidator = [
   body('accountName').exists().withMessage('Should have an account name with host'),
diff --git a/server/middlewares/validators/bulk.ts b/server/middlewares/validators/bulk.ts
index 847885101..9bb95f5b7 100644
--- a/server/middlewares/validators/bulk.ts
+++ b/server/middlewares/validators/bulk.ts
@@ -1,12 +1,11 @@
 import * as express from 'express'
 import { body } from 'express-validator'
 import { isBulkRemoveCommentsOfScopeValid } from '@server/helpers/custom-validators/bulk'
-import { doesAccountNameWithHostExist } from '@server/helpers/middlewares'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 import { UserRight } from '@shared/models'
 import { BulkRemoveCommentsOfBody } from '@shared/models/bulk/bulk-remove-comments-of-body.model'
 import { logger } from '../../helpers/logger'
-import { areValidationErrors } from './utils'
-import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
+import { areValidationErrors, doesAccountNameWithHostExist } from './shared'
 
 const bulkRemoveCommentsOfValidator = [
   body('accountName').exists().withMessage('Should have an account name with host'),
diff --git a/server/middlewares/validators/config.ts b/server/middlewares/validators/config.ts
index b5d6b4622..1aeadbe65 100644
--- a/server/middlewares/validators/config.ts
+++ b/server/middlewares/validators/config.ts
@@ -7,7 +7,7 @@ import { isThemeNameValid } from '../../helpers/custom-validators/plugins'
 import { isUserNSFWPolicyValid, isUserVideoQuotaDailyValid, isUserVideoQuotaValid } from '../../helpers/custom-validators/users'
 import { logger } from '../../helpers/logger'
 import { isThemeRegistered } from '../../lib/plugins/theme-utils'
-import { areValidationErrors } from './utils'
+import { areValidationErrors } from './shared'
 
 const customConfigUpdateValidator = [
   body('instance.name').exists().withMessage('Should have a valid instance name'),
diff --git a/server/middlewares/validators/feeds.ts b/server/middlewares/validators/feeds.ts
index aa16cc993..51e6d6fff 100644
--- a/server/middlewares/validators/feeds.ts
+++ b/server/middlewares/validators/feeds.ts
@@ -1,18 +1,18 @@
 import * as express from 'express'
 import { param, query } from 'express-validator'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 import { isValidRSSFeed } from '../../helpers/custom-validators/feeds'
 import { exists, isIdOrUUIDValid, isIdValid } from '../../helpers/custom-validators/misc'
 import { logger } from '../../helpers/logger'
 import {
+  areValidationErrors,
   doesAccountIdExist,
   doesAccountNameWithHostExist,
   doesUserFeedTokenCorrespond,
   doesVideoChannelIdExist,
-  doesVideoChannelNameWithHostExist
-} from '../../helpers/middlewares'
-import { doesVideoExist } from '../../helpers/middlewares/videos'
-import { areValidationErrors } from './utils'
-import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
+  doesVideoChannelNameWithHostExist,
+  doesVideoExist
+} from './shared'
 
 const feedsFormatValidator = [
   param('format').optional().custom(isValidRSSFeed).withMessage('Should have a valid format (rss, atom, json)'),
diff --git a/server/middlewares/validators/follows.ts b/server/middlewares/validators/follows.ts
index 733be379b..205baca48 100644
--- a/server/middlewares/validators/follows.ts
+++ b/server/middlewares/validators/follows.ts
@@ -1,6 +1,7 @@
 import * as express from 'express'
 import { body, param, query } from 'express-validator'
 import { isFollowStateValid } from '@server/helpers/custom-validators/follows'
+import { loadActorUrlOrGetFromWebfinger } from '@server/lib/activitypub/actors'
 import { getServerActor } from '@server/models/application/application'
 import { MActorFollowActorsDefault } from '@server/types/models'
 import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
@@ -8,11 +9,10 @@ import { isTestInstance } from '../../helpers/core-utils'
 import { isActorTypeValid, isValidActorHandle } from '../../helpers/custom-validators/activitypub/actor'
 import { isEachUniqueHostValid, isHostValid } from '../../helpers/custom-validators/servers'
 import { logger } from '../../helpers/logger'
-import { loadActorUrlOrGetFromWebfinger } from '../../helpers/webfinger'
 import { SERVER_ACTOR_NAME, WEBSERVER } from '../../initializers/constants'
 import { ActorModel } from '../../models/actor/actor'
 import { ActorFollowModel } from '../../models/actor/actor-follow'
-import { areValidationErrors } from './utils'
+import { areValidationErrors } from './shared'
 
 const listFollowsValidator = [
   query('state')
diff --git a/server/middlewares/validators/jobs.ts b/server/middlewares/validators/jobs.ts
index d87b28c06..5d89d167f 100644
--- a/server/middlewares/validators/jobs.ts
+++ b/server/middlewares/validators/jobs.ts
@@ -2,7 +2,7 @@ import * as express from 'express'
 import { param, query } from 'express-validator'
 import { isValidJobState, isValidJobType } from '../../helpers/custom-validators/jobs'
 import { logger, loggerTagsFactory } from '../../helpers/logger'
-import { areValidationErrors } from './utils'
+import { areValidationErrors } from './shared'
 
 const lTags = loggerTagsFactory('validators', 'jobs')
 
diff --git a/server/middlewares/validators/logs.ts b/server/middlewares/validators/logs.ts
index ba817d9a9..c55baaee3 100644
--- a/server/middlewares/validators/logs.ts
+++ b/server/middlewares/validators/logs.ts
@@ -1,9 +1,9 @@
 import * as express from 'express'
-import { logger } from '../../helpers/logger'
-import { areValidationErrors } from './utils'
-import { isDateValid } from '../../helpers/custom-validators/misc'
 import { query } from 'express-validator'
 import { isValidLogLevel } from '../../helpers/custom-validators/logs'
+import { isDateValid } from '../../helpers/custom-validators/misc'
+import { logger } from '../../helpers/logger'
+import { areValidationErrors } from './shared'
 
 const getLogsValidator = [
   query('startDate')
diff --git a/server/middlewares/validators/oembed.ts b/server/middlewares/validators/oembed.ts
index b1d763fbe..ab117635e 100644
--- a/server/middlewares/validators/oembed.ts
+++ b/server/middlewares/validators/oembed.ts
@@ -1,7 +1,7 @@
 import * as express from 'express'
 import { query } from 'express-validator'
 import { join } from 'path'
-import { fetchVideo } from '@server/helpers/video'
+import { fetchVideo } from '@server/lib/model-loaders'
 import { VideoPlaylistModel } from '@server/models/video/video-playlist'
 import { VideoPlaylistPrivacy, VideoPrivacy } from '@shared/models'
 import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
@@ -9,7 +9,7 @@ import { isTestInstance } from '../../helpers/core-utils'
 import { isIdOrUUIDValid } from '../../helpers/custom-validators/misc'
 import { logger } from '../../helpers/logger'
 import { WEBSERVER } from '../../initializers/constants'
-import { areValidationErrors } from './utils'
+import { areValidationErrors } from './shared'
 
 const playlistPaths = [
   join('videos', 'watch', 'playlist'),
diff --git a/server/middlewares/validators/pagination.ts b/server/middlewares/validators/pagination.ts
index 6b0a83d80..74eae251e 100644
--- a/server/middlewares/validators/pagination.ts
+++ b/server/middlewares/validators/pagination.ts
@@ -1,8 +1,8 @@
 import * as express from 'express'
 import { query } from 'express-validator'
-import { logger } from '../../helpers/logger'
-import { areValidationErrors } from './utils'
 import { PAGINATION } from '@server/initializers/constants'
+import { logger } from '../../helpers/logger'
+import { areValidationErrors } from './shared'
 
 const paginationValidator = paginationValidatorBuilder()
 
diff --git a/server/middlewares/validators/plugins.ts b/server/middlewares/validators/plugins.ts
index 5934a28bc..8c76d2e36 100644
--- a/server/middlewares/validators/plugins.ts
+++ b/server/middlewares/validators/plugins.ts
@@ -9,7 +9,7 @@ import { logger } from '../../helpers/logger'
 import { CONFIG } from '../../initializers/config'
 import { PluginManager } from '../../lib/plugins/plugin-manager'
 import { PluginModel } from '../../models/server/plugin'
-import { areValidationErrors } from './utils'
+import { areValidationErrors } from './shared'
 
 const getPluginValidator = (pluginType: PluginType, withVersion = true) => {
   const validators: (ValidationChain | express.Handler)[] = [
diff --git a/server/middlewares/validators/redundancy.ts b/server/middlewares/validators/redundancy.ts
index 3d557048a..da24f4c9b 100644
--- a/server/middlewares/validators/redundancy.ts
+++ b/server/middlewares/validators/redundancy.ts
@@ -1,14 +1,13 @@
 import * as express from 'express'
 import { body, param, query } from 'express-validator'
-import { exists, isBooleanValid, isIdOrUUIDValid, isIdValid, toBooleanOrNull, toIntOrNull } from '../../helpers/custom-validators/misc'
-import { logger } from '../../helpers/logger'
-import { areValidationErrors } from './utils'
-import { VideoRedundancyModel } from '../../models/redundancy/video-redundancy'
-import { isHostValid } from '../../helpers/custom-validators/servers'
-import { ServerModel } from '../../models/server/server'
-import { doesVideoExist } from '../../helpers/middlewares'
 import { isVideoRedundancyTarget } from '@server/helpers/custom-validators/video-redundancies'
 import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
+import { exists, isBooleanValid, isIdOrUUIDValid, isIdValid, toBooleanOrNull, toIntOrNull } from '../../helpers/custom-validators/misc'
+import { isHostValid } from '../../helpers/custom-validators/servers'
+import { logger } from '../../helpers/logger'
+import { VideoRedundancyModel } from '../../models/redundancy/video-redundancy'
+import { ServerModel } from '../../models/server/server'
+import { areValidationErrors, doesVideoExist } from './shared'
 
 const videoFileRedundancyGetValidator = [
   param('videoId').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid video id'),
diff --git a/server/middlewares/validators/search.ts b/server/middlewares/validators/search.ts
index d2f527750..e2e1c6aae 100644
--- a/server/middlewares/validators/search.ts
+++ b/server/middlewares/validators/search.ts
@@ -1,9 +1,9 @@
 import * as express from 'express'
-import { areValidationErrors } from './utils'
-import { logger } from '../../helpers/logger'
 import { query } from 'express-validator'
-import { isDateValid } from '../../helpers/custom-validators/misc'
 import { isSearchTargetValid } from '@server/helpers/custom-validators/search'
+import { isDateValid } from '../../helpers/custom-validators/misc'
+import { logger } from '../../helpers/logger'
+import { areValidationErrors } from './shared'
 
 const videosSearchValidator = [
   query('search').optional().not().isEmpty().withMessage('Should have a valid search'),
diff --git a/server/middlewares/validators/server.ts b/server/middlewares/validators/server.ts
index 2b34c4a76..fc7239b25 100644
--- a/server/middlewares/validators/server.ts
+++ b/server/middlewares/validators/server.ts
@@ -1,13 +1,13 @@
 import * as express from 'express'
-import { logger } from '../../helpers/logger'
-import { areValidationErrors } from './utils'
-import { isHostValid, isValidContactBody } from '../../helpers/custom-validators/servers'
-import { ServerModel } from '../../models/server/server'
 import { body } from 'express-validator'
-import { isUserDisplayNameValid } from '../../helpers/custom-validators/users'
-import { Redis } from '../../lib/redis'
-import { CONFIG, isEmailEnabled } from '../../initializers/config'
 import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
+import { isHostValid, isValidContactBody } from '../../helpers/custom-validators/servers'
+import { isUserDisplayNameValid } from '../../helpers/custom-validators/users'
+import { logger } from '../../helpers/logger'
+import { CONFIG, isEmailEnabled } from '../../initializers/config'
+import { Redis } from '../../lib/redis'
+import { ServerModel } from '../../models/server/server'
+import { areValidationErrors } from './shared'
 
 const serverGetValidator = [
   body('host').custom(isHostValid).withMessage('Should have a valid host'),
diff --git a/server/helpers/middlewares/abuses.ts b/server/middlewares/validators/shared/abuses.ts
similarity index 77%
rename from server/helpers/middlewares/abuses.ts
rename to server/middlewares/validators/shared/abuses.ts
index f0b1caba8..4a20a55fa 100644
--- a/server/helpers/middlewares/abuses.ts
+++ b/server/middlewares/validators/shared/abuses.ts
@@ -1,6 +1,6 @@
 import { Response } from 'express'
-import { AbuseModel } from '../../models/abuse/abuse'
-import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
+import { AbuseModel } from '@server/models/abuse/abuse'
+import { HttpStatusCode } from '@shared/core-utils'
 
 async function doesAbuseExist (abuseId: number | string, res: Response) {
   const abuse = await AbuseModel.loadByIdWithReporter(parseInt(abuseId + '', 10))
diff --git a/server/helpers/middlewares/accounts.ts b/server/middlewares/validators/shared/accounts.ts
similarity index 89%
rename from server/helpers/middlewares/accounts.ts
rename to server/middlewares/validators/shared/accounts.ts
index 7db79bc48..04da15441 100644
--- a/server/helpers/middlewares/accounts.ts
+++ b/server/middlewares/validators/shared/accounts.ts
@@ -1,8 +1,8 @@
 import { Response } from 'express'
+import { AccountModel } from '@server/models/account/account'
 import { UserModel } from '@server/models/user/user'
-import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
-import { AccountModel } from '../../models/account/account'
-import { MAccountDefault } from '../../types/models'
+import { MAccountDefault } from '@server/types/models'
+import { HttpStatusCode } from '@shared/core-utils'
 
 function doesAccountIdExist (id: number | string, res: Response, sendNotFound = true) {
   const promise = AccountModel.load(parseInt(id + '', 10))
diff --git a/server/helpers/middlewares/index.ts b/server/middlewares/validators/shared/index.ts
similarity index 63%
rename from server/helpers/middlewares/index.ts
rename to server/middlewares/validators/shared/index.ts
index f57f3ad31..fa89d05f2 100644
--- a/server/helpers/middlewares/index.ts
+++ b/server/middlewares/validators/shared/index.ts
@@ -1,7 +1,11 @@
 export * from './abuses'
 export * from './accounts'
+export * from './utils'
 export * from './video-blacklists'
 export * from './video-captions'
 export * from './video-channels'
+export * from './video-comments'
+export * from './video-imports'
+export * from './video-ownerships'
 export * from './video-playlists'
 export * from './videos'
diff --git a/server/middlewares/validators/utils.ts b/server/middlewares/validators/shared/utils.ts
similarity index 96%
rename from server/middlewares/validators/utils.ts
rename to server/middlewares/validators/shared/utils.ts
index e291f1b17..d3e4870a9 100644
--- a/server/middlewares/validators/utils.ts
+++ b/server/middlewares/validators/shared/utils.ts
@@ -1,6 +1,6 @@
 import * as express from 'express'
 import { query, validationResult } from 'express-validator'
-import { logger } from '../../helpers/logger'
+import { logger } from '../../../helpers/logger'
 
 function areValidationErrors (req: express.Request, res: express.Response) {
   const errors = validationResult(req)
diff --git a/server/helpers/middlewares/video-blacklists.ts b/server/middlewares/validators/shared/video-blacklists.ts
similarity index 77%
rename from server/helpers/middlewares/video-blacklists.ts
rename to server/middlewares/validators/shared/video-blacklists.ts
index 3494fd6b0..01491c10f 100644
--- a/server/helpers/middlewares/video-blacklists.ts
+++ b/server/middlewares/validators/shared/video-blacklists.ts
@@ -1,6 +1,6 @@
 import { Response } from 'express'
-import { VideoBlacklistModel } from '../../models/video/video-blacklist'
-import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
+import { VideoBlacklistModel } from '@server/models/video/video-blacklist'
+import { HttpStatusCode } from '@shared/core-utils'
 
 async function doesVideoBlacklistExist (videoId: number, res: Response) {
   const videoBlacklist = await VideoBlacklistModel.loadByVideoId(videoId)
diff --git a/server/helpers/middlewares/video-captions.ts b/server/middlewares/validators/shared/video-captions.ts
similarity index 79%
rename from server/helpers/middlewares/video-captions.ts
rename to server/middlewares/validators/shared/video-captions.ts
index 2a12c4813..80f6c5a52 100644
--- a/server/helpers/middlewares/video-captions.ts
+++ b/server/middlewares/validators/shared/video-captions.ts
@@ -1,7 +1,7 @@
 import { Response } from 'express'
-import { VideoCaptionModel } from '../../models/video/video-caption'
+import { VideoCaptionModel } from '@server/models/video/video-caption'
 import { MVideoId } from '@server/types/models'
-import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
+import { HttpStatusCode } from '@shared/core-utils'
 
 async function doesVideoCaptionExist (video: MVideoId, language: string, res: Response) {
   const videoCaption = await VideoCaptionModel.loadByVideoIdAndLanguage(video.id, language)
diff --git a/server/helpers/middlewares/video-channels.ts b/server/middlewares/validators/shared/video-channels.ts
similarity index 89%
rename from server/helpers/middlewares/video-channels.ts
rename to server/middlewares/validators/shared/video-channels.ts
index f5ed5ef0f..fe2e663b7 100644
--- a/server/helpers/middlewares/video-channels.ts
+++ b/server/middlewares/validators/shared/video-channels.ts
@@ -1,7 +1,7 @@
 import * as express from 'express'
+import { VideoChannelModel } from '@server/models/video/video-channel'
 import { MChannelBannerAccountDefault } from '@server/types/models'
-import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
-import { VideoChannelModel } from '../../models/video/video-channel'
+import { HttpStatusCode } from '@shared/core-utils'
 
 async function doesLocalVideoChannelNameExist (name: string, res: express.Response) {
   const videoChannel = await VideoChannelModel.loadLocalByNameAndPopulateAccount(name)
diff --git a/server/middlewares/validators/shared/video-comments.ts b/server/middlewares/validators/shared/video-comments.ts
new file mode 100644
index 000000000..83ea15c98
--- /dev/null
+++ b/server/middlewares/validators/shared/video-comments.ts
@@ -0,0 +1,73 @@
+import * as express from 'express'
+import { VideoCommentModel } from '@server/models/video/video-comment'
+import { MVideoId } from '@server/types/models'
+import { HttpStatusCode } from '@shared/core-utils'
+
+async function doesVideoCommentThreadExist (idArg: number | string, video: MVideoId, res: express.Response) {
+  const id = parseInt(idArg + '', 10)
+  const videoComment = await VideoCommentModel.loadById(id)
+
+  if (!videoComment) {
+    res.fail({
+      status: HttpStatusCode.NOT_FOUND_404,
+      message: 'Video comment thread not found'
+    })
+    return false
+  }
+
+  if (videoComment.videoId !== video.id) {
+    res.fail({ message: 'Video comment is not associated to this video.' })
+    return false
+  }
+
+  if (videoComment.inReplyToCommentId !== null) {
+    res.fail({ message: 'Video comment is not a thread.' })
+    return false
+  }
+
+  res.locals.videoCommentThread = videoComment
+  return true
+}
+
+async function doesVideoCommentExist (idArg: number | string, video: MVideoId, res: express.Response) {
+  const id = parseInt(idArg + '', 10)
+  const videoComment = await VideoCommentModel.loadByIdAndPopulateVideoAndAccountAndReply(id)
+
+  if (!videoComment) {
+    res.fail({
+      status: HttpStatusCode.NOT_FOUND_404,
+      message: 'Video comment thread not found'
+    })
+    return false
+  }
+
+  if (videoComment.videoId !== video.id) {
+    res.fail({ message: 'Video comment is not associated to this video.' })
+    return false
+  }
+
+  res.locals.videoCommentFull = videoComment
+  return true
+}
+
+async function doesCommentIdExist (idArg: number | string, res: express.Response) {
+  const id = parseInt(idArg + '', 10)
+  const videoComment = await VideoCommentModel.loadByIdAndPopulateVideoAndAccountAndReply(id)
+
+  if (!videoComment) {
+    res.fail({
+      status: HttpStatusCode.NOT_FOUND_404,
+      message: 'Video comment thread not found'
+    })
+    return false
+  }
+
+  res.locals.videoCommentFull = videoComment
+  return true
+}
+
+export {
+  doesVideoCommentThreadExist,
+  doesVideoCommentExist,
+  doesCommentIdExist
+}
diff --git a/server/middlewares/validators/shared/video-imports.ts b/server/middlewares/validators/shared/video-imports.ts
new file mode 100644
index 000000000..0f984bc17
--- /dev/null
+++ b/server/middlewares/validators/shared/video-imports.ts
@@ -0,0 +1,22 @@
+import * as express from 'express'
+import { VideoImportModel } from '@server/models/video/video-import'
+import { HttpStatusCode } from '@shared/core-utils'
+
+async function doesVideoImportExist (id: number, res: express.Response) {
+  const videoImport = await VideoImportModel.loadAndPopulateVideo(id)
+
+  if (!videoImport) {
+    res.fail({
+      status: HttpStatusCode.NOT_FOUND_404,
+      message: 'Video import not found'
+    })
+    return false
+  }
+
+  res.locals.videoImport = videoImport
+  return true
+}
+
+export {
+  doesVideoImportExist
+}
diff --git a/server/middlewares/validators/shared/video-ownerships.ts b/server/middlewares/validators/shared/video-ownerships.ts
new file mode 100644
index 000000000..fc27006ce
--- /dev/null
+++ b/server/middlewares/validators/shared/video-ownerships.ts
@@ -0,0 +1,24 @@
+import * as express from 'express'
+import { VideoChangeOwnershipModel } from '@server/models/video/video-change-ownership'
+import { HttpStatusCode } from '@shared/core-utils'
+
+async function doesChangeVideoOwnershipExist (idArg: number | string, res: express.Response) {
+  const id = parseInt(idArg + '', 10)
+  const videoChangeOwnership = await VideoChangeOwnershipModel.load(id)
+
+  if (!videoChangeOwnership) {
+    res.fail({
+      status: HttpStatusCode.NOT_FOUND_404,
+      message: 'Video change ownership not found'
+    })
+    return false
+  }
+
+  res.locals.videoChangeOwnership = videoChangeOwnership
+
+  return true
+}
+
+export {
+  doesChangeVideoOwnershipExist
+}
diff --git a/server/helpers/middlewares/video-playlists.ts b/server/middlewares/validators/shared/video-playlists.ts
similarity index 83%
rename from server/helpers/middlewares/video-playlists.ts
rename to server/middlewares/validators/shared/video-playlists.ts
index 3faeab677..d762859a8 100644
--- a/server/helpers/middlewares/video-playlists.ts
+++ b/server/middlewares/validators/shared/video-playlists.ts
@@ -1,7 +1,7 @@
 import * as express from 'express'
-import { VideoPlaylistModel } from '../../models/video/video-playlist'
-import { MVideoPlaylist } from '../../types/models/video/video-playlist'
-import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
+import { VideoPlaylistModel } from '@server/models/video/video-playlist'
+import { MVideoPlaylist } from '@server/types/models'
+import { HttpStatusCode } from '@shared/core-utils'
 
 export type VideoPlaylistFetchType = 'summary' | 'all'
 async function doesVideoPlaylistExist (id: number | string, res: express.Response, fetchType: VideoPlaylistFetchType = 'summary') {
diff --git a/server/helpers/middlewares/videos.ts b/server/middlewares/validators/shared/videos.ts
similarity index 92%
rename from server/helpers/middlewares/videos.ts
rename to server/middlewares/validators/shared/videos.ts
index 52b934eb7..a6dad4374 100644
--- a/server/helpers/middlewares/videos.ts
+++ b/server/middlewares/validators/shared/videos.ts
@@ -1,7 +1,7 @@
 import { Response } from 'express'
-import { fetchVideo, VideoFetchType } from '../video'
-import { UserRight } from '../../../shared/models/users'
-import { VideoChannelModel } from '../../models/video/video-channel'
+import { fetchVideo, VideoFetchType } from '@server/lib/model-loaders'
+import { VideoChannelModel } from '@server/models/video/video-channel'
+import { VideoFileModel } from '@server/models/video/video-file'
 import {
   MUser,
   MUserAccountId,
@@ -12,8 +12,8 @@ import {
   MVideoThumbnail,
   MVideoWithRights
 } from '@server/types/models'
-import { VideoFileModel } from '@server/models/video/video-file'
-import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
+import { HttpStatusCode } from '@shared/core-utils'
+import { UserRight } from '@shared/models'
 
 async function doesVideoExist (id: number | string, res: Response, fetchType: VideoFetchType = 'all') {
   const userId = res.locals.oauth ? res.locals.oauth.token.User.id : undefined
diff --git a/server/middlewares/validators/sort.ts b/server/middlewares/validators/sort.ts
index beecc155b..d67b6f3ba 100644
--- a/server/middlewares/validators/sort.ts
+++ b/server/middlewares/validators/sort.ts
@@ -1,5 +1,5 @@
 import { SORTABLE_COLUMNS } from '../../initializers/constants'
-import { checkSort, createSortableColumns } from './utils'
+import { checkSort, createSortableColumns } from './shared'
 
 // Initialize constants here for better performances
 const SORTABLE_USERS_COLUMNS = createSortableColumns(SORTABLE_COLUMNS.USERS)
diff --git a/server/middlewares/validators/themes.ts b/server/middlewares/validators/themes.ts
index 91ec0d7ac..d4716257f 100644
--- a/server/middlewares/validators/themes.ts
+++ b/server/middlewares/validators/themes.ts
@@ -1,11 +1,11 @@
 import * as express from 'express'
 import { param } from 'express-validator'
-import { logger } from '../../helpers/logger'
-import { areValidationErrors } from './utils'
-import { isPluginNameValid, isPluginVersionValid } from '../../helpers/custom-validators/plugins'
-import { PluginManager } from '../../lib/plugins/plugin-manager'
-import { isSafePath } from '../../helpers/custom-validators/misc'
 import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
+import { isSafePath } from '../../helpers/custom-validators/misc'
+import { isPluginNameValid, isPluginVersionValid } from '../../helpers/custom-validators/plugins'
+import { logger } from '../../helpers/logger'
+import { PluginManager } from '../../lib/plugins/plugin-manager'
+import { areValidationErrors } from './shared'
 
 const serveThemeCSSValidator = [
   param('themeName').custom(isPluginNameValid).withMessage('Should have a valid theme name'),
diff --git a/server/middlewares/validators/user-history.ts b/server/middlewares/validators/user-history.ts
index 647294cc3..1db0d9b26 100644
--- a/server/middlewares/validators/user-history.ts
+++ b/server/middlewares/validators/user-history.ts
@@ -1,8 +1,8 @@
 import * as express from 'express'
 import { body, query } from 'express-validator'
-import { logger } from '../../helpers/logger'
-import { areValidationErrors } from './utils'
 import { exists, isDateValid } from '../../helpers/custom-validators/misc'
+import { logger } from '../../helpers/logger'
+import { areValidationErrors } from './shared'
 
 const userHistoryListValidator = [
   query('search')
diff --git a/server/middlewares/validators/user-notifications.ts b/server/middlewares/validators/user-notifications.ts
index 21a7be08d..2f8e7686e 100644
--- a/server/middlewares/validators/user-notifications.ts
+++ b/server/middlewares/validators/user-notifications.ts
@@ -1,9 +1,9 @@
 import * as express from 'express'
 import { body, query } from 'express-validator'
-import { logger } from '../../helpers/logger'
-import { areValidationErrors } from './utils'
-import { isUserNotificationSettingValid } from '../../helpers/custom-validators/user-notifications'
 import { isNotEmptyIntArray, toBooleanOrNull } from '../../helpers/custom-validators/misc'
+import { isUserNotificationSettingValid } from '../../helpers/custom-validators/user-notifications'
+import { logger } from '../../helpers/logger'
+import { areValidationErrors } from './shared'
 
 const listUserNotificationsValidator = [
   query('unread')
diff --git a/server/middlewares/validators/user-subscriptions.ts b/server/middlewares/validators/user-subscriptions.ts
index 5f928b05b..ab7962923 100644
--- a/server/middlewares/validators/user-subscriptions.ts
+++ b/server/middlewares/validators/user-subscriptions.ts
@@ -6,7 +6,7 @@ import { toArray } from '../../helpers/custom-validators/misc'
 import { logger } from '../../helpers/logger'
 import { WEBSERVER } from '../../initializers/constants'
 import { ActorFollowModel } from '../../models/actor/actor-follow'
-import { areValidationErrors } from './utils'
+import { areValidationErrors } from './shared'
 
 const userSubscriptionListValidator = [
   query('search').optional().not().isEmpty().withMessage('Should have a valid search'),
diff --git a/server/middlewares/validators/users.ts b/server/middlewares/validators/users.ts
index 0eb9172c4..218633b8d 100644
--- a/server/middlewares/validators/users.ts
+++ b/server/middlewares/validators/users.ts
@@ -30,13 +30,12 @@ import {
 } from '../../helpers/custom-validators/users'
 import { isVideoChannelNameValid } from '../../helpers/custom-validators/video-channels'
 import { logger } from '../../helpers/logger'
-import { doesVideoExist } from '../../helpers/middlewares'
-import { isSignupAllowed, isSignupAllowedForCurrentIP } from '../../helpers/signup'
 import { isThemeRegistered } from '../../lib/plugins/theme-utils'
 import { Redis } from '../../lib/redis'
-import { UserModel } from '../../models/user/user'
+import { isSignupAllowed, isSignupAllowedForCurrentIP } from '../../lib/signup'
 import { ActorModel } from '../../models/actor/actor'
-import { areValidationErrors } from './utils'
+import { UserModel } from '../../models/user/user'
+import { areValidationErrors, doesVideoExist } from './shared'
 
 const usersListValidator = [
   query('blocked')
diff --git a/server/middlewares/validators/videos/video-blacklist.ts b/server/middlewares/validators/videos/video-blacklist.ts
index 65132a09f..7374ba774 100644
--- a/server/middlewares/validators/videos/video-blacklist.ts
+++ b/server/middlewares/validators/videos/video-blacklist.ts
@@ -1,11 +1,10 @@
 import * as express from 'express'
 import { body, param, query } from 'express-validator'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 import { isBooleanValid, isIdOrUUIDValid, toBooleanOrNull, toIntOrNull } from '../../../helpers/custom-validators/misc'
 import { isVideoBlacklistReasonValid, isVideoBlacklistTypeValid } from '../../../helpers/custom-validators/video-blacklist'
 import { logger } from '../../../helpers/logger'
-import { doesVideoBlacklistExist, doesVideoExist } from '../../../helpers/middlewares'
-import { areValidationErrors } from '../utils'
-import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
+import { areValidationErrors, doesVideoBlacklistExist, doesVideoExist } from '../shared'
 
 const videosBlacklistRemoveValidator = [
   param('videoId').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid videoId'),
diff --git a/server/middlewares/validators/videos/video-captions.ts b/server/middlewares/validators/videos/video-captions.ts
index 872d9c2ab..2295e049a 100644
--- a/server/middlewares/validators/videos/video-captions.ts
+++ b/server/middlewares/validators/videos/video-captions.ts
@@ -1,13 +1,12 @@
 import * as express from 'express'
-import { areValidationErrors } from '../utils'
-import { isIdOrUUIDValid } from '../../../helpers/custom-validators/misc'
 import { body, param } from 'express-validator'
-import { CONSTRAINTS_FIELDS, MIMETYPES } from '../../../initializers/constants'
 import { UserRight } from '../../../../shared'
-import { logger } from '../../../helpers/logger'
+import { isIdOrUUIDValid } from '../../../helpers/custom-validators/misc'
 import { isVideoCaptionFile, isVideoCaptionLanguageValid } from '../../../helpers/custom-validators/video-captions'
 import { cleanUpReqFiles } from '../../../helpers/express-utils'
-import { checkUserCanManageVideo, doesVideoCaptionExist, doesVideoExist } from '../../../helpers/middlewares'
+import { logger } from '../../../helpers/logger'
+import { CONSTRAINTS_FIELDS, MIMETYPES } from '../../../initializers/constants'
+import { areValidationErrors, checkUserCanManageVideo, doesVideoCaptionExist, doesVideoExist } from '../shared'
 
 const addVideoCaptionValidator = [
   param('videoId').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid video id'),
diff --git a/server/middlewares/validators/videos/video-channels.ts b/server/middlewares/validators/videos/video-channels.ts
index 331a51007..911a25bfb 100644
--- a/server/middlewares/validators/videos/video-channels.ts
+++ b/server/middlewares/validators/videos/video-channels.ts
@@ -12,10 +12,9 @@ import {
   isVideoChannelSupportValid
 } from '../../../helpers/custom-validators/video-channels'
 import { logger } from '../../../helpers/logger'
-import { doesLocalVideoChannelNameExist, doesVideoChannelNameWithHostExist } from '../../../helpers/middlewares'
 import { ActorModel } from '../../../models/actor/actor'
 import { VideoChannelModel } from '../../../models/video/video-channel'
-import { areValidationErrors } from '../utils'
+import { areValidationErrors, doesLocalVideoChannelNameExist, doesVideoChannelNameWithHostExist } from '../shared'
 
 const videoChannelsAddValidator = [
   body('name').custom(isActorPreferredUsernameValid).withMessage('Should have a valid channel name'),
diff --git a/server/middlewares/validators/videos/video-comments.ts b/server/middlewares/validators/videos/video-comments.ts
index aac25a787..1451ab988 100644
--- a/server/middlewares/validators/videos/video-comments.ts
+++ b/server/middlewares/validators/videos/video-comments.ts
@@ -2,19 +2,14 @@ import * as express from 'express'
 import { body, param, query } from 'express-validator'
 import { MUserAccountUrl } from '@server/types/models'
 import { UserRight } from '../../../../shared'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 import { exists, isBooleanValid, isIdOrUUIDValid, isIdValid, toBooleanOrNull } from '../../../helpers/custom-validators/misc'
-import {
-  doesVideoCommentExist,
-  doesVideoCommentThreadExist,
-  isValidVideoCommentText
-} from '../../../helpers/custom-validators/video-comments'
+import { isValidVideoCommentText } from '../../../helpers/custom-validators/video-comments'
 import { logger } from '../../../helpers/logger'
-import { doesVideoExist } from '../../../helpers/middlewares'
 import { AcceptResult, isLocalVideoCommentReplyAccepted, isLocalVideoThreadAccepted } from '../../../lib/moderation'
 import { Hooks } from '../../../lib/plugins/hooks'
 import { MCommentOwnerVideoReply, MVideo, MVideoFullLight } from '../../../types/models/video'
-import { areValidationErrors } from '../utils'
-import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
+import { areValidationErrors, doesVideoCommentExist, doesVideoCommentThreadExist, doesVideoExist } from '../shared'
 
 const listVideoCommentsValidator = [
   query('isLocal')
diff --git a/server/middlewares/validators/videos/video-imports.ts b/server/middlewares/validators/videos/video-imports.ts
index 55ff09124..85dc647ce 100644
--- a/server/middlewares/validators/videos/video-imports.ts
+++ b/server/middlewares/validators/videos/video-imports.ts
@@ -2,18 +2,17 @@ import * as express from 'express'
 import { body } from 'express-validator'
 import { isPreImportVideoAccepted } from '@server/lib/moderation'
 import { Hooks } from '@server/lib/plugins/hooks'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 import { VideoImportCreate } from '@shared/models/videos/import/video-import-create.model'
 import { isIdValid, toIntOrNull } from '../../../helpers/custom-validators/misc'
 import { isVideoImportTargetUrlValid, isVideoImportTorrentFile } from '../../../helpers/custom-validators/video-imports'
 import { isVideoMagnetUriValid, isVideoNameValid } from '../../../helpers/custom-validators/videos'
 import { cleanUpReqFiles } from '../../../helpers/express-utils'
 import { logger } from '../../../helpers/logger'
-import { doesVideoChannelOfAccountExist } from '../../../helpers/middlewares'
 import { CONFIG } from '../../../initializers/config'
 import { CONSTRAINTS_FIELDS } from '../../../initializers/constants'
-import { areValidationErrors } from '../utils'
+import { areValidationErrors, doesVideoChannelOfAccountExist } from '../shared'
 import { getCommonVideoEditAttributes } from './videos'
-import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 
 const videoImportAddValidator = getCommonVideoEditAttributes().concat([
   body('channelId')
diff --git a/server/middlewares/validators/videos/video-live.ts b/server/middlewares/validators/videos/video-live.ts
index 0fb864098..ffc8c47b3 100644
--- a/server/middlewares/validators/videos/video-live.ts
+++ b/server/middlewares/validators/videos/video-live.ts
@@ -1,20 +1,19 @@
 import * as express from 'express'
 import { body, param } from 'express-validator'
-import { checkUserCanManageVideo, doesVideoChannelOfAccountExist, doesVideoExist } from '@server/helpers/middlewares/videos'
+import { CONSTRAINTS_FIELDS } from '@server/initializers/constants'
+import { isLocalLiveVideoAccepted } from '@server/lib/moderation'
+import { Hooks } from '@server/lib/plugins/hooks'
+import { VideoModel } from '@server/models/video/video'
 import { VideoLiveModel } from '@server/models/video/video-live'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 import { ServerErrorCode, UserRight, VideoState } from '@shared/models'
 import { isBooleanValid, isIdOrUUIDValid, isIdValid, toBooleanOrNull, toIntOrNull } from '../../../helpers/custom-validators/misc'
 import { isVideoNameValid } from '../../../helpers/custom-validators/videos'
 import { cleanUpReqFiles } from '../../../helpers/express-utils'
 import { logger } from '../../../helpers/logger'
 import { CONFIG } from '../../../initializers/config'
-import { areValidationErrors } from '../utils'
+import { areValidationErrors, checkUserCanManageVideo, doesVideoChannelOfAccountExist, doesVideoExist } from '../shared'
 import { getCommonVideoEditAttributes } from './videos'
-import { VideoModel } from '@server/models/video/video'
-import { Hooks } from '@server/lib/plugins/hooks'
-import { isLocalLiveVideoAccepted } from '@server/lib/moderation'
-import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
-import { CONSTRAINTS_FIELDS } from '@server/initializers/constants'
 
 const videoLiveGetValidator = [
   param('videoId').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid videoId'),
diff --git a/server/middlewares/validators/videos/video-playlists.ts b/server/middlewares/validators/videos/video-playlists.ts
index 90815dd3a..0d2e6e90c 100644
--- a/server/middlewares/validators/videos/video-playlists.ts
+++ b/server/middlewares/validators/videos/video-playlists.ts
@@ -25,12 +25,11 @@ import {
 import { isVideoImage } from '../../../helpers/custom-validators/videos'
 import { cleanUpReqFiles } from '../../../helpers/express-utils'
 import { logger } from '../../../helpers/logger'
-import { doesVideoChannelIdExist, doesVideoExist, doesVideoPlaylistExist, VideoPlaylistFetchType } from '../../../helpers/middlewares'
 import { CONSTRAINTS_FIELDS } from '../../../initializers/constants'
 import { VideoPlaylistElementModel } from '../../../models/video/video-playlist-element'
 import { MVideoPlaylist } from '../../../types/models/video/video-playlist'
 import { authenticatePromiseIfNeeded } from '../../auth'
-import { areValidationErrors } from '../utils'
+import { areValidationErrors, doesVideoChannelIdExist, doesVideoExist, doesVideoPlaylistExist, VideoPlaylistFetchType } from '../shared'
 
 const videoPlaylistsAddValidator = getCommonPlaylistEditAttributes().concat([
   body('displayName')
diff --git a/server/middlewares/validators/videos/video-rates.ts b/server/middlewares/validators/videos/video-rates.ts
index 5c4176f54..4a802e75e 100644
--- a/server/middlewares/validators/videos/video-rates.ts
+++ b/server/middlewares/validators/videos/video-rates.ts
@@ -1,15 +1,14 @@
 import * as express from 'express'
 import { body, param, query } from 'express-validator'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
+import { VideoRateType } from '../../../../shared/models/videos'
+import { isAccountNameValid } from '../../../helpers/custom-validators/accounts'
 import { isIdOrUUIDValid, isIdValid } from '../../../helpers/custom-validators/misc'
 import { isRatingValid } from '../../../helpers/custom-validators/video-rates'
 import { isVideoRatingTypeValid } from '../../../helpers/custom-validators/videos'
 import { logger } from '../../../helpers/logger'
-import { areValidationErrors } from '../utils'
 import { AccountVideoRateModel } from '../../../models/account/account-video-rate'
-import { VideoRateType } from '../../../../shared/models/videos'
-import { isAccountNameValid } from '../../../helpers/custom-validators/accounts'
-import { doesVideoExist } from '../../../helpers/middlewares'
-import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
+import { areValidationErrors, doesVideoExist } from '../shared'
 
 const videoUpdateRateValidator = [
   param('id').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
diff --git a/server/middlewares/validators/videos/video-shares.ts b/server/middlewares/validators/videos/video-shares.ts
index f0d8e0c36..cc2f66e94 100644
--- a/server/middlewares/validators/videos/video-shares.ts
+++ b/server/middlewares/validators/videos/video-shares.ts
@@ -1,11 +1,10 @@
 import * as express from 'express'
 import { param } from 'express-validator'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 import { isIdOrUUIDValid, isIdValid } from '../../../helpers/custom-validators/misc'
 import { logger } from '../../../helpers/logger'
 import { VideoShareModel } from '../../../models/video/video-share'
-import { areValidationErrors } from '../utils'
-import { doesVideoExist } from '../../../helpers/middlewares'
-import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
+import { areValidationErrors, doesVideoExist } from '../shared'
 
 const videosShareValidator = [
   param('id').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
diff --git a/server/middlewares/validators/videos/video-watch.ts b/server/middlewares/validators/videos/video-watch.ts
index 00c739d31..ef8b89ece 100644
--- a/server/middlewares/validators/videos/video-watch.ts
+++ b/server/middlewares/validators/videos/video-watch.ts
@@ -1,10 +1,9 @@
-import { body, param } from 'express-validator'
 import * as express from 'express'
-import { isIdOrUUIDValid, toIntOrNull } from '../../../helpers/custom-validators/misc'
-import { areValidationErrors } from '../utils'
-import { logger } from '../../../helpers/logger'
-import { doesVideoExist } from '../../../helpers/middlewares'
+import { body, param } from 'express-validator'
 import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
+import { isIdOrUUIDValid, toIntOrNull } from '../../../helpers/custom-validators/misc'
+import { logger } from '../../../helpers/logger'
+import { areValidationErrors, doesVideoExist } from '../shared'
 
 const videoWatchingValidator = [
   param('videoId').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
diff --git a/server/middlewares/validators/videos/videos.ts b/server/middlewares/validators/videos/videos.ts
index b7a9bcbe3..52e6c5762 100644
--- a/server/middlewares/validators/videos/videos.ts
+++ b/server/middlewares/validators/videos/videos.ts
@@ -22,7 +22,7 @@ import {
   toValueOrNull
 } from '../../../helpers/custom-validators/misc'
 import { isBooleanBothQueryValid, isNumberArray, isStringArray } from '../../../helpers/custom-validators/search'
-import { checkUserCanTerminateOwnershipChange, doesChangeVideoOwnershipExist } from '../../../helpers/custom-validators/video-ownership'
+import { checkUserCanTerminateOwnershipChange } from '../../../helpers/custom-validators/video-ownership'
 import {
   isScheduleVideoUpdatePrivacyValid,
   isVideoCategoryValid,
@@ -42,12 +42,6 @@ import {
 import { cleanUpReqFiles } from '../../../helpers/express-utils'
 import { getDurationFromVideoFile } from '../../../helpers/ffprobe-utils'
 import { logger } from '../../../helpers/logger'
-import {
-  checkUserCanManageVideo,
-  doesVideoChannelOfAccountExist,
-  doesVideoExist,
-  doesVideoFileOfVideoExist
-} from '../../../helpers/middlewares'
 import { deleteFileAndCatch } from '../../../helpers/utils'
 import { getVideoWithAttributes } from '../../../helpers/video'
 import { CONFIG } from '../../../initializers/config'
@@ -57,7 +51,14 @@ import { Hooks } from '../../../lib/plugins/hooks'
 import { AccountModel } from '../../../models/account/account'
 import { VideoModel } from '../../../models/video/video'
 import { authenticatePromiseIfNeeded } from '../../auth'
-import { areValidationErrors } from '../utils'
+import {
+  areValidationErrors,
+  checkUserCanManageVideo,
+  doesChangeVideoOwnershipExist,
+  doesVideoChannelOfAccountExist,
+  doesVideoExist,
+  doesVideoFileOfVideoExist
+} from '../shared'
 
 const videosAddLegacyValidator = getCommonVideoEditAttributes().concat([
   body('videofile')
diff --git a/server/middlewares/validators/webfinger.ts b/server/middlewares/validators/webfinger.ts
index 097a5ece1..bcdd136c6 100644
--- a/server/middlewares/validators/webfinger.ts
+++ b/server/middlewares/validators/webfinger.ts
@@ -5,7 +5,7 @@ import { isWebfingerLocalResourceValid } from '../../helpers/custom-validators/w
 import { getHostWithPort } from '../../helpers/express-utils'
 import { logger } from '../../helpers/logger'
 import { ActorModel } from '../../models/actor/actor'
-import { areValidationErrors } from './utils'
+import { areValidationErrors } from './shared'
 
 const webfingerValidator = [
   query('resource').custom(isWebfingerLocalResourceValid).withMessage('Should have a valid webfinger resource'),