The guy choking is not positioning himself properly behind you. His head is not supposed to be aligned with your head, that leaves way too much room in that choking arm. With the right positioning, you wouldn´t have enough room to move your head around.
Alex Hi Alex I’m not sure what you mean by standard rear choke as there are probably quite a few different ways of doing it. Also I never pretend that everything will work all the time. A really good hard punch in the face is a great technique but it’s no good if you are not near thr person. This technique gives you some options but as I said in the video the most important part is getting the chin into the shoulder and the shoulder high because if somebody gets a clean rear naked choke on you it can be over very quickly. Hope this helps.