In reality, if I remember well, Google obliged Microsoft to delete their youtube app because they were not using the html5 public api they give to all devs ( an

In reality, if I remember well, Google obliged Microsoft to delete their youtube app because they were not using the html5 public api they give to all devs ( and not respecting the tos the second time). Microsoft answered that at the moment (wp8) they could not use html5 api on their apps without some performance problems and, indeed, you are able to develop native apps with html5/css/js only with the recent 8.1 update. I think that at this moment Microsoft can again build a youtube app both respecting the TOS and using the html5 public api without performance issues