Autofellatio is a technique of masturbation that is tried at least once by more than 50% of males.
It requires certain features such as an outstanding flexibility and a large penis. Therefore, it can be performed by only about 1-3 out of 1000 men.
Since way less than 1% of the population has been in front of a camera while nude, there may be 1 guy, out of one million, willing to show autofellatio to the world.
I am one of those. You can also watch video here.