Could you change the model in your spinosaurus demo to the model from Jurassic World: Evolution?
That's not how copyright works, kid.
He got away with using the Primal Carnage model.
PC is an indie game, which is why it's easy to obtain. No AAA companies protect the property but the artists themselves. It's different for JW:E because it's property of Universal Studios that Frontier is authorized to handle.