I see a very pushy horse there that is running over people.
Her use of NH methods (they all use the same, just with fancy names) is very off. I agree fully that she did not follow through with the correct methods, was way off on her timing, and she lost her patience.
I've slapped horses on the cheek before, Because they weren't giving to the lighter pressure I had applied. I've Yanked horses around to get two eyes as well. Although, I am not a fan of the big snaps under. Whopping him on the butt is to disengage his hindquarters if he wont get his butt out of my way.
Be as light as possible but as much force as necessary.
No, my horses are not head shy. They are not flighty. And they Respect people