Files created:
----------------------------------------
{output_directory}
  .ytdl-sub-single_song_test-download-archive.json
{output_directory}/YouTube/[2019] YouTube Rewind 2019： For the Record ｜ #YouTubeRewind
  01 - YouTube Rewind 2019： For the Record ｜ #YouTubeRewind.mp3
    Embedded Thumbnail, Music Tags:
      genres:
        - multi_tag_1
        - multi_tag_2
    Embedded thumbnail
  folder.jpg