I really need to find some decent backup solution for the lot of it.

After my share of run-ins with dead drives and disappearing YouTube videos, I just switched to keeping my ‘collection’ in my notes, with links to a service that works at the moment. And since I'm into outliner notes with some extra features, it's all categorized with a hierarchy and tags, and annotated if I have any useful info. The notes are synced between desktop machines and the phone, and I'll probably cook up some extra backups too.

This approach lived through three different operating systems, without me needing to migrate any big file collections for it.