title: Play private YouTube video using YoutubePlayerView from YoutubeAndroidPlayerAPI?
body: <p>I've started using YouTube API for Android a month ago. I'm trying to make an Android application which can play some videos which includes my uploaded videos. With the public videos, it works. But with the private videos, YoutubePlayerView shows: "Please sign in".</p>
  
  <p>I couldn't figure out how to <strong>sign in</strong> and <strong>play these videos</strong> since YoutubeAndroidPlayerAPI seems not support authentication.</p>
  
  <p>This is what I'm doing with "JurB9k3_Ws4" is my private video ID.</p>
  
  <pre><code>@Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.playerview_demo);
  
      YouTubePlayerView youTubeView = (YouTubePlayerView) findViewById(R.id.youtube_view);
      youTubeView.initialize(DeveloperKey.DEVELOPER_KEY, new YouTubePlayer.OnInitializedListener() {
  
          @Override
          public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer youTubePlayer,
                                              boolean b) {
              youTubePlayer.cueVideo("JurB9k3_Ws4");
          }
  
          @Override
          public void onInitializationFailure(YouTubePlayer.Provider provider,
                                              YouTubeInitializationResult youTubeInitializationResult) {
  
          }
      });
  }
  </code></pre>