New tag called pixilation
If there's any live action human footage being obviously modified or animated, I think it should have the tag pixilation on it.

https://sakugabooru.com/post/show/201125
This is an example of a post that can use the tag

https://www.youtube.com/watch?v=_5IqwECL6bo
it has comparable approaches to it like this video over here.

Anyone who has other ideas to expand upon?
There's not many posts that this would apply to, so personally I think it's fine to just use live-action + stop-motion tags. (Live-action people shot with stop-motion technique)