EgalitarianMonkey/hometube ? reverse-engineered prompt

Build me a friendly local web app for downloading videos and playlists into a clean home media library.

I want to paste in a video URL, choose where it should go, and have it download the best quality version available, then automatically save it in a sensible folder structure that works nicely with Jellyfin, Plex, or Emby. It should support common sites like YouTube and other major video platforms, and it should handle cookies for more reliable downloads and restricted content.

Please include sponsor and ad skipping support, basic video processing like trimming clips, subtitle embedding, format conversion, and audio only downloads. It would also be great if playlist sync is smart enough to keep a local library in step with the source over time.

Make it easy to run locally, ideally with Docker, and keep the interface simple enough for a normal person to use from any device on the network. If you need to look up current docs online, feel free to.