I really do love paleoart. It's an interesting interpretation and speculation of the history of our earth. The ones about Precambrian are especially fascinating.
Thought I could recommend some paleoart Youtube channels:
Deadsound:
Really good dinosaur animations and I also like his "making of" videos where he explains his creative process and the science behind his dinosaur designs and behavior.
There's also his newer series which, although not paleoart, does have dinosaurs in it.
Wasn't a big fan of the previous entries because I couldn't really get into the anthropomorphic characters but I really liked this last entry. It's more of a Lovecraft/Conan the Barbarian kind of story than anything else.
Kayakasaurus:
There's this guy that makes dinosaur dioramas and sculptures. It's really satisfying to see him turn a lump of clay into such detailed models. He may have also randomly been in the chat of one of Josh's last streams on Youtube but I don't think that VOD is saved anywhere.
Mario Lanzas:
Usually does size comparison videos of different prehistoric animals which I'm not really into but I really like this recent animation he did.