Hahahahah this is so great! I love that horse. He is so gentle but gives him just enough of a pinch to hurt and he knows it. What a character.
Of course the person scratching his withers wasn't helping! That made him want to reciprocate and scratch back. And the cameraman was there for that handy scratch.
I agree with Helen, why didn't he just move over a few feet. It was the ear nibble that would have made me move!