/// <summary>
/// Downloads context to audio, requires Url, Optional - VideoInfo (Default: Highest Quality), Optional - BaseDirectory
/// </summary>
public async static Task ToAudioAsync(this YoutubeContext context) {
if (context==null)
throw new ArgumentException(nameof(context));
if (string.IsNullOrEmpty(context.Url))
throw new ArgumentException(nameof(context.Url));
if (context.VideoInfo == null)
await context.FindHighestAudioQualityDownloadUrlAsync();
var ad = new AudioDownloader(context);
await ad.ExecuteAsync();
}