Added max concurrent downloads setting

Fixed issue where navigating to a subscription video would make the player behave like a playlist for the whole sub

src/app/components/unified-file-card/unified-file-card.component.ts

@@ -141,10 +141,6 @@ export class UnifiedFileCardComponent implements OnInit {
       fullLocation += `&jwt=${this.jwtString}`;
     }
 
-    if (this.file_obj['sub_id']) {
-      fullLocation += `&sub_id=${this.file_obj['sub_id']}`;
-    }
-
     fullLocation += '&t=,10';
 
     return fullLocation;