This is a remarkably patient and tolerant lizard: he must have a good home. The kitten has no idea how close he is to being bitten. There’s just a tiny bit of lizard body language to suggest he wouldn’t mind if the cat went somewhere else. But these two are going to be good friends before long. Trust me, I’ve seen it done.
I don’t think the colossal green lizard we see at the end of the video is real.