I liked the video. Nice, as you say, as a demo on jujutsu. Which exact branch it is? The attacks where not honest attacks, but he was sick, and people get nervous during exams, and he surely was trying to help you. Also, I do believe that part of your grading is during normal class. In my school the Sempai and the Sensei keep repeating there is no defence if the attack is not honest. I can't recall the Japanese for it. My Sensei's Sensei (Kai Kuniyuki) in a demonstration knocked with a karate chop his Uke (5th dan) for not doing a "honest attack", which caused him look bad.