public void ContextToVideo()
 {
     var yc = new YoutubeContext(Url) {BaseDirectory = new DirectoryInfo(Path.GetTempPath())};
     try {
         yc.ToVideo(VideoType.Mp4);
         Assert.IsTrue(File.Exists(yc.VideoPath.FullName));
         Debug.WriteLine(yc.VideoPath.FullName);
     } finally {
         if (yc.VideoPath != null && File.Exists(yc.VideoPath.FullName))
             File.Delete(yc.VideoPath.FullName);
         Assert.IsFalse(File.Exists(yc.VideoPath.FullName));
     }
 }