Tangential discussion: my daughter recently asked to look through our family videos and we've been getting through them the last few nights. It's wonderful. Both kids are enjoying seeing themselves being ... themselves, embarrassingly unbound by the learned shame and anxieties that come from moving into teenage-hood.
I'm glad my backup and storage setup has stood the test of (thus far a relatively short) time.
Most videos are from mobiles, and I use syncthing on each device to automatically back them up to NAS. The NAS has an external USB drive to which back ups are directed, plus another NAS in the shed as a secondary on-site backup - which also has an external USB HDD that gets backed up to. All of the backups other than mobile device to NAS via Syncthing are done with crontab'd rsync scripts.
I then irregularly rotate portable USB-caddied HDDs from my parents and in-laws houses and backup to them as well. This rotation is well overdue, thanks for the reminder.
I don't do cloud. It feels too ephemeral in the context of my history with online services - I change my mind and switch around a bit, and lose interest here and there. I'm the kind of person who would host their own email server if I wasn't already gigabytes deep in a grandfathered free custom domain plan from Google. (I do actually host my own email server using Citadel, but it's a domain that's very rarely used and entirely non-critical).