Host your own instance if everyone bans them. Not only because of your control over the content, but because you will not burden their servers.

this is an opportunity for Lemmy to get some more users and goodwill.

Making some grand assumptions on those "users" being desirable or in any way a net positive.

Probably /gif/ on 4chan.....

It's great when folks like OP make it easy to know to block them.

have you considered fucking not?

Google for fediverse instance block lists and pick one of the right-wing cesspits that brag about their "free speech" and "no censorship" policies. Let's see how much free speech they really tolerate.

Or try these Lemmy instances. They're already trash, so no worries about ruining anything:
maga.place
hilariouschaos.com

Bruh leave the NSFL and people dying videos elsewhere. No one wants to see someone get their arm ripped off by heavy machinery. Maybe 4chan?

I knew what the first one is, I managed to find the second one. Nothing about the third one other than Low Frequency Oscillator.

no instance manager wants to host stuff like that and assume liability so either spin up your own lemmy/piefed or play whackamole

go to 4chan

Threadiverse instances aren't really rigged up for hosting video. Some will handle certain formats of video files, but the size is normally limited, and IIRC they don't guarantee that they'll retain the video for an extended period of time. I guess that one could link to externally-hosted ones.

I'd kind of suggest that PeerTube is really more oriented towards video posting.

https://peertube.fediverse.observer/

I guess someone could post to a PeerTube instance and then submit their posted video to the Threadiverse for discussion or something.

You have to be a horrible person to enjoy videos like that

Rule 5. Locking.