You guys that rag him, think about this. He started out as a normal guy that loved working out. He decided to learn as much as he could about what he loved, training and dieting. The majority of people that train, know very little about nutrition and working out. They just do whatever everyone else does. He has now dedicated his life to learning as much as possible with how the body deals with amino's and all that fun stuff. That's a hell of a lot more than what most people do.
Regardless if he is natural or not, you can still learn from the video. He has done more with what he has than 99% of the people on this board.