NewPipe or Patched YouTube App using ReVanced Manager

Just use Syncthing?

You can read more Here

If you try to rate-limit them, they’ll just switch to other IPs all the time. If you try to block them by User Agent string, they’ll just switch to a non-bot UA string (no, really). This is literally a DDoS on the entire internet.

https://pod.geraspora.de/posts/17342163

They just Fake User Agents If you Block them

That literally exists for Flatpaks