2 files changed, 7 insertions, 4 deletions

diff --git a/client/src/assets/player/webtorrent/video-renderer.ts b/client/src/assets/player/webtorrent/video-renderer.ts
index 4dce87112..c3cbea725 100644
--- a/client/src/assets/player/webtorrent/video-renderer.ts
+++ b/client/src/assets/player/webtorrent/video-renderer.ts
@@ -51,7 +51,7 @@ function renderMedia (file: any, elem: HTMLVideoElement, opts: RenderMediaOption
       return callback(err)
     })
     preparedElem.addEventListener('loadstart', onLoadStart)
-    return videostream(file, preparedElem)
+    return new videostream(file, preparedElem)
   }
 
   function useMediaSource (useVP9 = false) {
diff --git a/client/src/assets/player/webtorrent/webtorrent-plugin.ts b/client/src/assets/player/webtorrent/webtorrent-plugin.ts
index eee3d4db9..95f52dfe1 100644
--- a/client/src/assets/player/webtorrent/webtorrent-plugin.ts
+++ b/client/src/assets/player/webtorrent/webtorrent-plugin.ts
@@ -234,9 +234,12 @@ class WebTorrentPlugin extends Plugin {
 
     const oldTorrent = this.torrent
     const torrentOptions = {
-      store: (chunkLength: number, storeOpts: any) => new CacheChunkStore(new PeertubeChunkStore(chunkLength, storeOpts), {
-        max: 100
-      })
+      // Don't use arrow function: it breaks webtorrent (that uses `new` keyword)
+      store: function (chunkLength: number, storeOpts: any) {
+        return new CacheChunkStore(new PeertubeChunkStore(chunkLength, storeOpts), {
+          max: 100
+        })
+      }
     }
 
     this.torrent = this.webtorrent.add(magnetOrTorrentUrl, torrentOptions, torrent => {