Never use someone else's platform as the only location for anything you're not prepared to lose at a moment's notice.
Lesson learned I hope.
I can tell you that YouTube is not the right place for storing family videos. Google Photos is more appropriate for that, and you should be using Google Takeout on a regular basis to back everything up to a hard drive or secondary cloud service.
We should all be aware by now that what in 1995 was "my hard drive stopped working and I lost all my data", is now in 2024 "my account got closed and I lost all my data". As consumers, we now back up primarily not because disks break, but because we lose access.
(I'm not condoning Google here, just saying that this is the sad reality with any cloud provider.)