It's worth noting this isn't the best method of doing it. Some people like to make personal YouTube playlists, and they like to include, or sometimes specifical

It's worth noting this isn't the best method of doing it. Some people like to make personal YouTube playlists, and they like to include, or sometimes specifically add Patreon reward unlisted videos to their playlists. They then forget to list their playlist as private, meaning it's discoverable via a youtube search.