public void play_list()
{
    if (song_list.size()>song_play)
    {
        VideoActivity.startVideo(song_list.get(song_play).provider_id, song_list.get(song_play).provider);
    }
}

public static void startVideo(String video_id,int video_provider)
{

    videoHolder.stopPlayback();
    videoHolder.setVideoURI(Uri.parse(DataApi.extractVideoUrl(video_id,video_provider)));
    videoHolder.requestFocus();
    videoHolder.start();
}