found the original to judge, didn't realize this was taken from a 2 minute song that features about 20 seconds worth of saxophone. His breathing is actually convincing, although you don't see his left hand move, can't see the right well enough to judge if he is moving any fingers on his right hand (playing that range of notes would allow you to leave your left had in place without moving.) I would not be surprised if indeed he was not playing.
Sorry to take away from the original intent of the thread, I laughed when I first saw him dancing