I will be sucker # 2 then.
As I said before, the less verbal commands given the better. It is almost like crying wolf if you know what I mean.
Also, when you are waving your hand in front of the dog, it actually entices the dog to react in the way that you see in the video. It actually causes more excitement than it does anything else.
What I see is too many things happening all at once. If I found it confusing, the dog certainly finds it confusing.
I see no aggression issues. What I do see is a dog that is confused and excited all at the same time.
Bottom line - there is no consistancy, control and a follow through with what is being asked of the dog.