Yeah, the weird filenames bothers me, too. It does take a hit to data portability, for sure. I’m not using it for some kind of long-term, bomb-proof YouTube archiving, but more to have offline access to instructional videos I might need in the near future. For that, the UI and integration with Jellyfin works well for me.

If I was actually collecting youtube videos, I would go with something else that generates human-friendly folders and filenames! I’ll bookmark Tubesync :)