private async void MP3()
        {
            try
            {
                IsMP3Downloading   = true;
                MP3ButtonEnabled   = false;
                VideoButtonEnabled = false;

                await _YoutubeClient.DownloadAsMP3(VideoUrl, _MP3Progress, AudioDownloadInfo, null, null, CancellationToken.None);
            }
            catch (HttpRequestException ex)
            {
                MessageBox.Show("Fehler beim Verbindungsaufbau" + Environment.NewLine + ex.Message +
                                (ex.InnerException == null ? Environment.NewLine + ex.InnerException.Message : ""));
            }
            catch (ArgumentException ex)
            {
                MessageBox.Show(ex.Message, "Ungültiger Parameter");
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                IsMP3Downloading   = false;
                MP3ButtonEnabled   = true;
                VideoButtonEnabled = true;
                MP3Percentage      = 0;
            }
        }