First, I need to preface this by telling you that I own Wolf/Malamute hybrids and, while it was not stated in the video, this on looks as if it may be a wolf hybrid as well.
Caesar, in my opinion, handle the dog perfectly. He did not choke the animal, he merely prevent it form biting him then, asked it to submit as soon as that was possible. This dog wasn't showing aggression, it was trying to dominate Caesar. Like my own wolfdogs, a show of dominance, testing the hierarchy is not unusual. These animals will do that occasionally.
While mine have never attempted to bite me, they have challenged me several times, that's normal behavior. I have put them on the ground and asked them to submit exactly as Caesar did this one. That's the proper way to handle them, it doesn't hurt the animal, it isn't punishing them, it's communicating with them in a way they understand.
Caesar did what he needed to do to prevent a bite from the dog, then corrected the dog in a way the dog understood. That's the right things to do in that situation. Rather than chastise, I would applaud Caesar for his handling of the dog in this video.