title: How do I replace MPMoviePlayer notifications?
body: <p>In iOS 9 MPMoviePlayer and all his components are deprecated. 
  We used MPMoviePlayerController notifications, like <code>MPMoviePlayerLoadStateDidChangeNotification, MPMovieDurationAvailableNotification, MPMoviePlayerPlaybackStateDidChangeNotification, MPMoviePlayerReadyForDisplayDidChangeNotification</code>, to track video service quality. But now with AVPlayerViewController I can't find properly replacement for these notifications.</p>
  
  <p>How do I replace these notifications now?</p>