private string GetFileNameWithExtension(AudioOnlyStreamInfo streamInfo)
{
string extension = streamInfo.IsOpus() && ExtractOpus ? "opus" : streamInfo.Container.Name;
string fileName = GetSafeFileName(VideoMetaData?.Title ?? HttpUtility.ParseQueryString(new Uri(YouTubeUrl).Query)["v"] ?? Path.GetRandomFileName());
return($"{fileName}.{extension}");
}
