diff --git a/client/videowatch-client-plugin.ts b/client/videowatch-client-plugin.ts
index 87e83352..6e6df72a 100644
--- a/client/videowatch-client-plugin.ts
+++ b/client/videowatch-client-plugin.ts
@@ -41,14 +41,7 @@ function register ({ registerHook, peertubeHelpers }: RegisterOptions): void {
       return null
     }
     let iframeUri = ''
-    if (!settings['chat-use-builtin']) {
-      iframeUri = settings['chat-uri'] || ''
-      iframeUri = iframeUri.replace(/{{VIDEO_UUID}}/g, uuid)
-      if (!/^https?:\/\//.test(iframeUri)) {
-        logger.error('The webchaturi must begin with https://')
-        return null
-      }
-    } else {
+    if (settings['chat-use-prosody'] || settings['chat-use-builtin']) {
       // Using the builtin converseJS
       // FIXME: with Peertube 3.0.1 there is no loadByIdOrUUID method,
       // we need to pass the complete url.
@@ -57,6 +50,16 @@ function register ({ registerHook, peertubeHelpers }: RegisterOptions): void {
         const url: string = video.originInstanceUrl + '/videos/watch/' + uuid
         iframeUri = getBaseRoute() + '/webchat?url=' + encodeURIComponent(url)
       }
+    } else if (!settings['chat-use-builtin']) {
+      iframeUri = settings['chat-uri'] || ''
+      iframeUri = iframeUri.replace(/{{VIDEO_UUID}}/g, uuid)
+      if (!/^https?:\/\//.test(iframeUri)) {
+        logger.error('The webchaturi must begin with https://')
+        return null
+      }
+    } else {
+      logger.error('Dont known which url use for the iframe.')
+      return null
     }
     if (iframeUri === '') {
       logger.error('No iframe uri')
diff --git a/server/lib/routers/webchat.ts b/server/lib/routers/webchat.ts
index e7a9ed62..edb3e4da 100644
--- a/server/lib/routers/webchat.ts
+++ b/server/lib/routers/webchat.ts
@@ -1,4 +1,5 @@
 import type { Router, Request, Response, NextFunction } from 'express'
+import { getBaseRouter } from '../helpers'
 import * as path from 'path'
 const fs = require('fs').promises
 
@@ -13,22 +14,36 @@ async function initWebchatRouter ({
   router.get('/', async (req: Request, res: Response, next: NextFunction) => {
     try {
       const settings = await settingsManager.getSettings([
-        'chat-use-builtin', 'chat-room', 'chat-server',
+        'chat-use-prosody', 'chat-use-builtin', 'chat-room', 'chat-server',
         'chat-bosh-uri', 'chat-ws-uri'
       ])
 
-      if (!settings['chat-use-builtin']) {
+      let server: string
+      let room: string
+      let boshUri: string
+      let wsUri: string
+      if (settings['chat-use-prosody']) {
+        server = 'localhost'
+        room = '{{VIDEO_UUID}}@room.localhost'
+        boshUri = getBaseRouter() + 'http-bind'
+        wsUri = ''
+      } else if (settings['chat-use-builtin']) {
+        if (!settings['chat-server']) {
+          throw new Error('Missing chat-server settings.')
+        }
+        if (!settings['chat-room']) {
+          throw new Error('Missing chat-room settings.')
+        }
+        if (!settings['chat-bosh-uri'] && !settings['chat-ws-uri']) {
+          throw new Error('Missing BOSH or Websocket uri.')
+        }
+        server = settings['chat-server'] as string
+        room = settings['chat-room'] as string
+        boshUri = settings['chat-bosh-uri'] as string
+        wsUri = settings['chat-ws-uri'] as string
+      } else {
         throw new Error('Builtin chat disabled.')
       }
-      if (!settings['chat-server']) {
-        throw new Error('Missing chat-server settings.')
-      }
-      if (!settings['chat-room']) {
-        throw new Error('Missing chat-room settings.')
-      }
-      if (!settings['chat-bosh-uri'] && !settings['chat-ws-uri']) {
-        throw new Error('Missing BOSH or Websocket uri.')
-      }
 
       // FIXME: with Peertube 3.0.1 the following method is not available...
       // When loadByIdOrUUID is available, change the entry point to
@@ -54,11 +69,11 @@ async function initWebchatRouter ({
       // FIXME: Peertube should provide the static folder path. For now:
       const staticRelative = '../static'
       page = page.replace(/{{BASE_STATIC_URL}}/g, staticRelative)
-      page = page.replace(/{{JID}}/g, settings['chat-server'] as string)
-      const room = (settings['chat-room'] as string).replace(/{{VIDEO_UUID}}/g, video.uuid)
+      page = page.replace(/{{JID}}/g, server)
+      room = room.replace(/{{VIDEO_UUID}}/g, video.uuid)
       page = page.replace(/{{ROOM}}/g, room)
-      page = page.replace(/{{BOSH_SERVICE_URL}}/g, settings['chat-bosh-uri'] as string)
-      page = page.replace(/{{WS_SERVICE_URL}}/g, settings['chat-ws-uri'] as string)
+      page = page.replace(/{{BOSH_SERVICE_URL}}/g, boshUri)
+      page = page.replace(/{{WS_SERVICE_URL}}/g, wsUri)
 
       res.status(200)
       res.type('html')