title: Avplayer wont playing video from url
body: <p>AVPlayer not playing video when I'm trying to play it from url. But when I try download and play video its playing.What I'm doing wrong ? </p>
  
  <pre><code>self.avAsset = AVAsset(URL: NSURL(string: contentURLString)!)
   let item = AVPlayerItem(asset: avAsset)
              avPlayer = AVPlayer(playerItem: item)
              playerLayer = AVPlayerLayer(player: avPlayer)
              playerLayer.frame = self.view.frame
              playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
              cell.videoView.layer.addSublayer(playerLayer)
              self.avPlayer.seekToTime(kCMTimeZero)
              avPlayer.play()
  </code></pre>