Where can I find gore communities on the fediverse?

Probably more on PeerTube

a different Fediverse service dedicated to video, aimed at being more of a YouTube analog

rather than the Reddit-alike Threadiverse.

searches

This looks like an example.

https://bestgore.fun/videos/browse

EDIT: Or https://goresee.com/videos/browse

EDIT2: I haven't tried interacting with PeerTube instances via Lemmy or Mbin or PieFed myself, but there's some level of integration.

It looks like maybe each user on a PeerTube instance has a "locked community" that contains their video posts from Lemmy's standpoint. So, for example:

!unitednations@bestgore.fun

or

!nihil@goresee.com

You could try subscribing and see if the future posts from those users subsequently start showing up on All for you and other people who use your Threadiverse instance as a home instance.

But I can't provide much advice, as I haven't explored any of this before.

My own suspicion is that it's probably preferable to create a separate account on a PeerTube home instance. Like, their web UI is geared around making it easy to search and browse video content.

The only one I know of is also specifically for footage of operations in the Ukrainian/Russian war. And I can't recall the exact community name ATM.

Not likely going to see it on a general server. Threads like that comes up on 4chans gif board every so often. Might be better for you to go there.