Plex is the destination for my setup, too. I have a bookmarklet I can click when I'm on any Youtube (or other video) page that sends the URL to a local Flask ap

Plex is the destination for my setup, too. I have a bookmarklet I can click when I'm on any Youtube (or other video) page that sends the URL to a local Flask app that's just a wrapper for calling yt-dlp with the right args and post-processing.