Fix play of videos on ios

When the user already played a video

client/src/app/+videos/+video-watch/video-watch.component.ts

@@ -117,6 +117,8 @@ export class VideoWatchComponent implements OnInit, OnDestroy {
   }
 
   async ngOnInit () {
+    PeertubePlayerManager.initState()
+
     this.serverConfig = this.serverService.getTmpConfig()
 
     this.configSub = this.serverService.getConfig()

client/src/assets/player/peertube-player-manager.ts

@@ -119,6 +119,10 @@ export class PeertubePlayerManager {
 
   private static alreadyPlayed = false
 
+  static initState () {
+    PeertubePlayerManager.alreadyPlayed = false
+  }
+
   static async initialize (mode: PlayerMode, options: PeertubePlayerManagerOptions, onPlayerChange: (player: videojs.Player) => void) {
     let p2pMediaLoader: any