I am not providing direct links to this video because I don't want to encourage this.
The mixture depicted here has been the kind of BS that has led others to their deaths.
No self bondage mixed with breath control. EVER!
Getting off is great, but getting to get off another day is better.
There is someone out there who will tie your ass up and do awful things to you, if you are patient and work hard to find the right one. The reward for that hard work is being able to get off while playing on the edge.
Taking a shortcut like this person did is a fast-track to a world of hurt.
Don't ever do this, my friends.