

Not sure this is what you are looking for, but syncthing is for self-hosting and it’s Peer-2-Peer. I use it to synchronize my important documents and photos across my devices, it has options for encryption and file versioning.
Syncthing is the 3 in my 3-2-1 backup strategy. It enables me to maintain 3 copies of my files: desktop, phone, NAS
You have to be crazy to watch YouTube without an ad-blocker in this day and age! On mobile (Android at least), Firefox with ublock works well for YouTube.