DSL or one of the Puppy flavors.
DFX4509B_2
There's only like, one viable instance though: inv.nadeko.net.
A RISC-V equivalent might be better in terms of hardware openness.
Assuming mirroring isn't borked by that aforementioned DRM.
At least Meta straight-up admitted to grifting people, Google has yet to do so.
I laughed way harder than I should've at that.
Age-gated vids have been login-walled for a while now, non-age-gated stuff is still viewable while logged out and through alt front-ends, for now.
I won't put it past Google to fully login-wall YT at some point in the future though, or even worse, put DRM on it so that it's only watchable through Chrome on Android, or Chrome or Edge on Windows, and non-Android and non-Windows OSes, and non-Chrome/Edge browsers are blocked, as well as alt front-ends and downloaders, and even mirroring to competing platforms.
Invidious mainly, and that doesn't use any YT accounts, it's the equivalent of watching YT logged out.
Also, Grayjay lets you log in through it but that probably doesn't bypass the age check if you're KYC'd.
If you're an active creator yourself though or even if you only have a few vids you made years ago that are still up, I'd set up PeerTube, Odysee, or both, and post those there while you still can, though.
One more reason to use an alt front-end, and clear/disable your watch/view history and not log into YT directly anymore, at least while you still can.
Linux of course, it's been headlining lately in terms of improvements particularly on the gaming front, but also FreeBSD based on how quickly it's been moving in terms of improvements on the general desktop front, FreeBSD is at the point where it's a viable third option on the desktop if you're not gaming, although that's assuming you're running its CURRENT branch since that's where the latest development happens.
You know things are getting bad when two governments are on your case about your patent trolling, Nintendo.
Chat Control got forced through the backdoor, btw.