I think the video is crap because the camera is far away and you a wearing all black with a dark background. It's hard for me to tell what's going on...
You do know that any dog is capable of biting right? I have a spaniel and occasionally they have been known to have issues being startled from sleep...
Point A is the top of the patella. Not the top of the lady's quad. Point B is the hip crease. Point B needs to drop below point A and below parallel...