God i wish it were this easy.
There are already a few discussions on this video on SS, and i'm not sure i've seen anyone say they've been able to exactly replicate this kind of method.
Personal anatomy definitely plays a big part, this person in the video is using a fixed collar and it is still able to apply enough pressure to compress the carotid arteries without a slip knot or any additional force. I cannot even accomplish this with night-night method + partial hanging with slipknot.