fix(xtream): set initial player in case settings are missing

this commit fixes #326

src/app/xtream/xtream-main-container.component.ts

@@ -336,7 +336,7 @@ export class XtreamMainContainerComponent implements OnInit {
     }
 
     openPlayer(streamUrl: string, title: string) {
-        this.player = this.settings().player ?? VideoPlayer.VideoJs;
+        this.player = this.settings()?.player ?? VideoPlayer.VideoJs;
         if (this.player === VideoPlayer.MPV) {
             if (!this.hideExternalInfoDialog())
                 this.dialog.open(ExternalPlayerInfoDialogComponent);