I should also collect the alternatives to youtube. Not frontends, like invidious, cloudtube, piped, or whatever, but other video hosting and streaming sites.
Odysee https://odysee.com/
Rumble https://rumble.com/
BitChute https://www.bitchute.com/
Peertube https://joinpeertube.org/ - demo instance: https://peertube.cpy.re/

I also found this Joystream stuff https://www.joystream.org/ but I don't know any instances.

All suffers from the problem that the content is slim, and that mostly those content creators set up shop whom are censored or likely get censored by youtube. Which means low quality political stuff, US republican, conspiracy theorist and the like will be the staple.
On Odysee I got surprised luckily, see the above posts. And there are tech stuff.
Survival Russia has rumble, but I think he puts just a couple of videos there.
BitChute is probably the worse in content I got the impression it really is just pol-tier stuff. And not even endpol-tier but 4chan/pol-tier or 8chan-qanon tier.
Peertube, I think it's too fragmented, can't really discover instances, unless you know someone who hosts his stuff, you won't find it. Liek: https://videos.lukesmith.xyz or https://videos.icum.to/ And anyway from the examples we can conclude only crazy people use it.