diff --git a/client/src/app/+admin/system/jobs/jobs.component.ts b/client/src/app/+admin/system/jobs/jobs.component.ts
index f7e10fd04..42f503be6 100644
--- a/client/src/app/+admin/system/jobs/jobs.component.ts
+++ b/client/src/app/+admin/system/jobs/jobs.component.ts
@@ -25,6 +25,7 @@ export class JobsComponent extends RestTable implements OnInit {
 
     'activitypub-follow',
     'activitypub-http-broadcast',
+    'activitypub-http-broadcast-parallel',
     'activitypub-http-fetcher',
     'activitypub-http-unicast',
     'activitypub-refresher',
diff --git a/scripts/simulate-many-viewers.ts b/scripts/simulate-many-viewers.ts
new file mode 100644
index 000000000..fb666c318
--- /dev/null
+++ b/scripts/simulate-many-viewers.ts
@@ -0,0 +1,89 @@
+import Bluebird from 'bluebird'
+import { wait } from '@shared/core-utils'
+import {
+  createSingleServer,
+  doubleFollow,
+  killallServers,
+  PeerTubeServer,
+  setAccessTokensToServers,
+  waitJobs
+} from '@shared/server-commands'
+
+let servers: PeerTubeServer[]
+const viewers: { xForwardedFor: string }[] = []
+let videoId: string
+
+run()
+  .then(() => process.exit(0))
+  .catch(err => console.error(err))
+  .finally(() => killallServers(servers))
+
+async function run () {
+  await prepare()
+
+  while (true) {
+    await runViewers()
+  }
+}
+
+async function prepare () {
+  console.log('Preparing servers...')
+
+  const config = {
+    log: {
+      level: 'info'
+    },
+    rates_limit: {
+      api: {
+        max: 5_000_000
+      }
+    },
+    views: {
+      videos: {
+        local_buffer_update_interval: '30 minutes',
+        ip_view_expiration: '1 hour'
+      }
+    }
+  }
+
+  servers = await Promise.all([
+    createSingleServer(1, config, { nodeArgs: [ '--inspect' ] }),
+    createSingleServer(2, config),
+    createSingleServer(3, config)
+  ])
+
+  await setAccessTokensToServers(servers)
+  await doubleFollow(servers[0], servers[1])
+  await doubleFollow(servers[0], servers[2])
+
+  const { uuid } = await servers[0].videos.quickUpload({ name: 'video' })
+  videoId = uuid
+
+  await waitJobs(servers)
+
+  const THOUSAND_VIEWERS = 2
+
+  for (let i = 2; i < 252; i++) {
+    for (let j = 2; j < 6; j++) {
+      for (let k = 2; k < THOUSAND_VIEWERS + 2; k++) {
+        viewers.push({ xForwardedFor: `0.${k}.${j}.${i},127.0.0.1` })
+      }
+    }
+  }
+
+  console.log('Servers preparation finished.')
+}
+
+async function runViewers () {
+  console.log('Will run views of %d viewers.', viewers.length)
+
+  const before = new Date().getTime()
+
+  await Bluebird.map(viewers, viewer => {
+    return servers[0].views.simulateView({ id: videoId, xForwardedFor: viewer.xForwardedFor })
+  }, { concurrency: 100 })
+
+  console.log('Finished to run views in %d seconds.', (new Date().getTime() - before) / 1000)
+
+  await wait(5000)
+}
diff --git a/server/initializers/constants.ts b/server/initializers/constants.ts
index 2d324d1eb..75ccbc458 100644
--- a/server/initializers/constants.ts
+++ b/server/initializers/constants.ts
@@ -139,6 +139,7 @@ const REMOTE_SCHEME = {
 
 const JOB_ATTEMPTS: { [id in JobType]: number } = {
   'activitypub-http-broadcast': 1,
+  'activitypub-http-broadcast-parallel': 1,
   'activitypub-http-unicast': 1,
   'activitypub-http-fetcher': 2,
   'activitypub-follow': 5,
@@ -159,6 +160,7 @@ const JOB_ATTEMPTS: { [id in JobType]: number } = {
 // Excluded keys are jobs that can be configured by admins
 const JOB_CONCURRENCY: { [id in Exclude<JobType, 'video-transcoding' | 'video-import'>]: number } = {
   'activitypub-http-broadcast': 1,
+  'activitypub-http-broadcast-parallel': 30,
   'activitypub-http-unicast': 10,
   'activitypub-http-fetcher': 3,
   'activitypub-cleaner': 1,
@@ -176,6 +178,7 @@ const JOB_CONCURRENCY: { [id in Exclude<JobType, 'video-transcoding' | 'video-im
 }
 const JOB_TTL: { [id in JobType]: number } = {
   'activitypub-http-broadcast': 60000 * 10, // 10 minutes
+  'activitypub-http-broadcast-parallel': 60000 * 10, // 10 minutes
   'activitypub-http-unicast': 60000 * 10, // 10 minutes
   'activitypub-http-fetcher': 1000 * 3600 * 10, // 10 hours
   'activitypub-follow': 60000 * 10, // 10 minutes
@@ -371,7 +374,7 @@ const VIEW_LIFETIME = {
   VIEWER_STATS: 60000 * 60 // 1 hour
 }
 
-const MAX_LOCAL_VIEWER_WATCH_SECTIONS = 10
+const MAX_LOCAL_VIEWER_WATCH_SECTIONS = 100
 
 let CONTACT_FORM_LIFETIME = 60000 * 60 // 1 hour
 
diff --git a/server/lib/activitypub/local-video-viewer.ts b/server/lib/activitypub/local-video-viewer.ts
index 738083adc..bdd746791 100644
--- a/server/lib/activitypub/local-video-viewer.ts
+++ b/server/lib/activitypub/local-video-viewer.ts
@@ -23,7 +23,7 @@ async function createOrUpdateLocalVideoViewer (watchAction: WatchActionObject, v
       : null,
 
     videoId: video.id
-  })
+  }, { transaction: t })
 
   await LocalVideoViewerWatchSectionModel.bulkCreateSections({
     localVideoViewerId: localVideoViewer.id,
@@ -31,7 +31,9 @@ async function createOrUpdateLocalVideoViewer (watchAction: WatchActionObject, v
     watchSections: watchAction.watchSections.map(s => ({
       start: s.startTimestamp,
       end: s.endTimestamp
-    }))
+    })),
+
+    transaction: t
   })
 }
 
diff --git a/server/lib/activitypub/send/send-view.ts b/server/lib/activitypub/send/send-view.ts
index 25a20ec6d..bf3451603 100644
--- a/server/lib/activitypub/send/send-view.ts
+++ b/server/lib/activitypub/send/send-view.ts
@@ -26,7 +26,7 @@ async function sendView (options: {
     return buildViewActivity({ url, byActor, video, audience, type })
   }
 
-  return sendVideoRelatedActivity(activityBuilder, { byActor, video, transaction, contextType: 'View' })
+  return sendVideoRelatedActivity(activityBuilder, { byActor, video, transaction, contextType: 'View', parallelizable: true })
 }
 
 // ---------------------------------------------------------------------------
diff --git a/server/lib/activitypub/send/shared/audience-utils.ts b/server/lib/activitypub/send/shared/audience-utils.ts
index ba4be487c..2f6b0741d 100644
--- a/server/lib/activitypub/send/shared/audience-utils.ts
+++ b/server/lib/activitypub/send/shared/audience-utils.ts
@@ -3,7 +3,7 @@ import { ACTIVITY_PUB } from '@server/initializers/constants'
 import { ActorModel } from '@server/models/actor/actor'
 import { VideoModel } from '@server/models/video/video'
 import { VideoShareModel } from '@server/models/video/video-share'
-import { MActorFollowersUrl, MActorLight, MActorUrl, MCommentOwner, MCommentOwnerVideo, MVideoId } from '@server/types/models'
+import { MActorFollowersUrl, MActorUrl, MCommentOwner, MCommentOwnerVideo, MVideoId } from '@server/types/models'
 import { ActivityAudience } from '@shared/models'
 
 function getOriginVideoAudience (accountActor: MActorUrl, actorsInvolvedInVideo: MActorFollowersUrl[] = []): ActivityAudience {
@@ -51,13 +51,13 @@ function getAudienceFromFollowersOf (actorsInvolvedInObject: MActorFollowersUrl[
 }
 
 async function getActorsInvolvedInVideo (video: MVideoId, t: Transaction) {
-  const actors: MActorLight[] = await VideoShareModel.loadActorsByShare(video.id, t)
+  const actors = await VideoShareModel.listActorIdsAndFollowerUrlsByShare(video.id, t)
 
   const videoAll = video as VideoModel
 
   const videoActor = videoAll.VideoChannel?.Account
     ? videoAll.VideoChannel.Account.Actor
-    : await ActorModel.loadFromAccountByVideoId(video.id, t)
+    : await ActorModel.loadAccountActorFollowerUrlByVideoId(video.id, t)
 
   actors.push(videoActor)
 
diff --git a/server/lib/activitypub/send/shared/send-utils.ts b/server/lib/activitypub/send/shared/send-utils.ts
index dbcde91ee..fcec63991 100644
--- a/server/lib/activitypub/send/shared/send-utils.ts
+++ b/server/lib/activitypub/send/shared/send-utils.ts
@@ -15,17 +15,18 @@ async function sendVideoRelatedActivity (activityBuilder: (audience: ActivityAud
   byActor: MActorLight
   video: MVideoImmutable | MVideoAccountLight
   contextType: ContextType
+  parallelizable?: boolean
   transaction?: Transaction
 }) {
-  const { byActor, video, transaction, contextType } = options
-
-  const actorsInvolvedInVideo = await getActorsInvolvedInVideo(video, transaction)
+  const { byActor, video, transaction, contextType, parallelizable } = options
 
   // Send to origin
   if (video.isOwned() === false) {
     return sendVideoActivityToOrigin(activityBuilder, options)
   }
 
+  const actorsInvolvedInVideo = await getActorsInvolvedInVideo(video, transaction)
+
   // Send to followers
   const audience = getAudienceFromFollowersOf(actorsInvolvedInVideo)
   const activity = activityBuilder(audience)
@@ -38,6 +39,7 @@ async function sendVideoRelatedActivity (activityBuilder: (audience: ActivityAud
     toFollowersOf: actorsInvolvedInVideo,
     transaction,
     actorsException,
+    parallelizable,
     contextType
   })
 }
@@ -130,9 +132,10 @@ async function broadcastToFollowers (options: {
   transaction: Transaction
   contextType: ContextType
 
+  parallelizable?: boolean
   actorsException?: MActorWithInboxes[]
 }) {
-  const { data, byActor, toFollowersOf, transaction, contextType, actorsException = [] } = options
+  const { data, byActor, toFollowersOf, transaction, contextType, actorsException = [], parallelizable } = options
 
   const uris = await computeFollowerUris(toFollowersOf, actorsException, transaction)
 
@@ -141,6 +144,7 @@ async function broadcastToFollowers (options: {
       uris,
       data,
       byActor,
+      parallelizable,
       contextType
     })
   })
@@ -173,8 +177,9 @@ function broadcastTo (options: {
   data: any
   byActor: MActorId
   contextType: ContextType
+  parallelizable?: boolean // default to false
 }) {
-  const { uris, data, byActor, contextType } = options
+  const { uris, data, byActor, contextType, parallelizable } = options
 
   if (uris.length === 0) return undefined
 
@@ -200,7 +205,13 @@ function broadcastTo (options: {
       contextType
     }
 
-    JobQueue.Instance.createJob({ type: 'activitypub-http-broadcast', payload })
+    JobQueue.Instance.createJob({
+      type: parallelizable
+        ? 'activitypub-http-broadcast-parallel'
+        : 'activitypub-http-broadcast',
+
+      payload
+    })
   }
 
   for (const unicastUri of unicastUris) {
diff --git a/server/lib/job-queue/job-queue.ts b/server/lib/job-queue/job-queue.ts
index 61e41fb0f..ce24763f1 100644
--- a/server/lib/job-queue/job-queue.ts
+++ b/server/lib/job-queue/job-queue.ts
@@ -43,6 +43,7 @@ import { processVideosViewsStats } from './handlers/video-views-stats'
 
 type CreateJobArgument =
   { type: 'activitypub-http-broadcast', payload: ActivitypubHttpBroadcastPayload } |
+  { type: 'activitypub-http-broadcast-parallel', payload: ActivitypubHttpBroadcastPayload } |
   { type: 'activitypub-http-unicast', payload: ActivitypubHttpUnicastPayload } |
   { type: 'activitypub-http-fetcher', payload: ActivitypubHttpFetcherPayload } |
   { type: 'activitypub-http-cleaner', payload: {} } |
@@ -68,6 +69,7 @@ export type CreateJobOptions = {
 
 const handlers: { [id in JobType]: (job: Job) => Promise<any> } = {
   'activitypub-http-broadcast': processActivityPubHttpBroadcast,
+  'activitypub-http-broadcast-parallel': processActivityPubHttpBroadcast,
   'activitypub-http-unicast': processActivityPubHttpUnicast,
   'activitypub-http-fetcher': processActivityPubHttpFetcher,
   'activitypub-cleaner': processActivityPubCleaner,
@@ -93,6 +95,7 @@ const errorHandlers: { [id in JobType]?: (job: Job, err: any) => Promise<any> }
 const jobTypes: JobType[] = [
   'activitypub-follow',
   'activitypub-http-broadcast',
+  'activitypub-http-broadcast-parallel',
   'activitypub-http-fetcher',
   'activitypub-http-unicast',
   'activitypub-cleaner',
diff --git a/server/lib/views/shared/video-viewer-counters.ts b/server/lib/views/shared/video-viewer-counters.ts
index 941b62ed7..999ab7d8d 100644
--- a/server/lib/views/shared/video-viewer-counters.ts
+++ b/server/lib/views/shared/video-viewer-counters.ts
@@ -1,4 +1,3 @@
-
 import { isTestInstance } from '@server/helpers/core-utils'
 import { logger, loggerTagsFactory } from '@server/helpers/logger'
 import { VIEW_LIFETIME } from '@server/initializers/constants'
diff --git a/server/models/actor/actor.ts b/server/models/actor/actor.ts
index 93145b8ae..943b7364f 100644
--- a/server/models/actor/actor.ts
+++ b/server/models/actor/actor.ts
@@ -1,5 +1,5 @@
 import { values } from 'lodash'
-import { literal, Op, Transaction } from 'sequelize'
+import { literal, Op, QueryTypes, Transaction } from 'sequelize'
 import {
   AllowNull,
   BelongsTo,
@@ -43,15 +43,18 @@ import {
   MActorAccountChannelId,
   MActorAPAccount,
   MActorAPChannel,
+  MActorFollowersUrl,
   MActorFormattable,
   MActorFull,
   MActorHost,
+  MActorId,
   MActorServer,
   MActorSummaryFormattable,
   MActorUrl,
   MActorWithInboxes
 } from '../../types/models'
 import { AccountModel } from '../account/account'
+import { getServerActor } from '../application/application'
 import { ServerModel } from '../server/server'
 import { isOutdated, throwIfNotValid } from '../utils'
 import { VideoModel } from '../video/video'
@@ -304,7 +307,10 @@ export class ActorModel extends Model<Partial<AttributesOnly<ActorModel>>> {
   })
   VideoChannel: VideoChannelModel
 
-  static load (id: number): Promise<MActor> {
+  static async load (id: number): Promise<MActor> {
+    const actorServer = await getServerActor()
+    if (id === actorServer.id) return actorServer
+
     return ActorModel.unscoped().findByPk(id)
   }
 
@@ -312,48 +318,21 @@ export class ActorModel extends Model<Partial<AttributesOnly<ActorModel>>> {
     return ActorModel.scope(ScopeNames.FULL).findByPk(id)
   }
 
-  static loadFromAccountByVideoId (videoId: number, transaction: Transaction): Promise<MActor> {
-    const query = {
-      include: [
-        {
-          attributes: [ 'id' ],
-          model: AccountModel.unscoped(),
-          required: true,
-          include: [
-            {
-              attributes: [ 'id' ],
-              model: VideoChannelModel.unscoped(),
-              required: true,
-              include: [
-                {
-                  attributes: [ 'id' ],
-                  model: VideoModel.unscoped(),
-                  required: true,
-                  where: {
-                    id: videoId
-                  }
-                }
-              ]
-            }
-          ]
-        }
-      ],
+  static loadAccountActorFollowerUrlByVideoId (videoId: number, transaction: Transaction) {
+    const query = `SELECT "actor"."id" AS "id", "actor"."followersUrl" AS "followersUrl" ` +
+                  `FROM "actor" ` +
+                  `INNER JOIN "account" ON "actor"."id" = "account"."actorId" ` +
+                  `INNER JOIN "videoChannel" ON "videoChannel"."accountId" = "account"."id" ` +
+                  `INNER JOIN "video" ON "video"."channelId" = "videoChannel"."id" AND "video"."id" = :videoId`
+
+    const options = {
+      type: QueryTypes.SELECT as QueryTypes.SELECT,
+      replacements: { videoId },
+      plain: true as true,
       transaction
     }
 
-    return ActorModel.unscoped().findOne(query)
-  }
-
-  static isActorUrlExist (url: string) {
-    const query = {
-      raw: true,
-      where: {
-        url
-      }
-    }
-
-    return ActorModel.unscoped().findOne(query)
-      .then(a => !!a)
+    return ActorModel.sequelize.query<MActorId & MActorFollowersUrl>(query, options)
   }
 
   static listByFollowersUrls (followersUrls: string[], transaction?: Transaction): Promise<MActorFull[]> {
diff --git a/server/models/video/video-share.ts b/server/models/video/video-share.ts
index ad95dec6e..ca63bb2d9 100644
--- a/server/models/video/video-share.ts
+++ b/server/models/video/video-share.ts
@@ -3,7 +3,7 @@ import { AllowNull, BelongsTo, Column, CreatedAt, DataType, ForeignKey, Is, Mode
 import { AttributesOnly } from '@shared/typescript-utils'
 import { isActivityPubUrlValid } from '../../helpers/custom-validators/activitypub/misc'
 import { CONSTRAINTS_FIELDS } from '../../initializers/constants'
-import { MActorDefault } from '../../types/models'
+import { MActorDefault, MActorFollowersUrl, MActorId } from '../../types/models'
 import { MVideoShareActor, MVideoShareFull } from '../../types/models/video'
 import { ActorModel } from '../actor/actor'
 import { buildLocalActorIdsIn, throwIfNotValid } from '../utils'
@@ -107,22 +107,19 @@ export class VideoShareModel extends Model<Partial<AttributesOnly<VideoShareMode
     })
   }
 
-  static loadActorsByShare (videoId: number, t: Transaction): Promise<MActorDefault[]> {
-    const query = {
-      where: {
-        videoId
-      },
-      include: [
-        {
-          model: ActorModel,
-          required: true
-        }
-      ],
+  static listActorIdsAndFollowerUrlsByShare (videoId: number, t: Transaction) {
+    const query = `SELECT "actor"."id" AS "id", "actor"."followersUrl" AS "followersUrl" ` +
+                  `FROM "videoShare" ` +
+                  `INNER JOIN "actor" ON "actor"."id" = "videoShare"."actorId" ` +
+                  `WHERE "videoShare"."videoId" = :videoId`
+
+    const options = {
+      type: QueryTypes.SELECT as QueryTypes.SELECT,
+      replacements: { videoId },
       transaction: t
     }
 
-    return VideoShareModel.scope(ScopeNames.FULL).findAll(query)
-                          .then((res: MVideoShareFull[]) => res.map(r => r.Actor))
+    return VideoShareModel.sequelize.query<MActorId & MActorFollowersUrl>(query, options)
   }
 
   static loadActorsWhoSharedVideosOf (actorOwnerId: number, t: Transaction): Promise<MActorDefault[]> {
diff --git a/shared/models/server/job.model.ts b/shared/models/server/job.model.ts
index 073f15872..4633ab769 100644
--- a/shared/models/server/job.model.ts
+++ b/shared/models/server/job.model.ts
@@ -9,6 +9,7 @@ export type JobState = 'active' | 'completed' | 'failed' | 'waiting' | 'delayed'
 export type JobType =
   | 'activitypub-http-unicast'
   | 'activitypub-http-broadcast'
+  | 'activitypub-http-broadcast-parallel'
   | 'activitypub-http-fetcher'
   | 'activitypub-cleaner'
   | 'activitypub-follow'