That's John Stone- I happen to know him as a member of his website/community. Great guy.
And that video is a few years old. He's since bulked to much larger proportions. Very dedicated to diet and routine, has a great home gym.
John more recently:http://www.johnstonefitness.com/php/pictures.php
He addressed the video on his website:
My initial transformation video from way back in 2003 has gone viral again. If you are one of those people who just saw my video for the first time, I'd like to address a few common comments...
The transformation is 100% real. I took a picture every day from January 6, 2003 through April 28, 2004 (I believe the video currently being circulated only shows the first year or so, however). I did not, nor have I ever, used steroids. Yes, I was way too tan back then (also, that was a real tan - I live in Florida and spent a lot of time outside with my shirt off once I lost the fat). I agree that many of my boxer shorts were ridiculous, especially the M&M boxers. I also agree that the bleached hair was a terrible decision, and I am keenly aware of how stupid it looked. Clearly I was very skinny and didn't have much muscle at the end of my first fat loss phase, but I've added a lot of muscle since then (adding muscle takes a lot of time, especially if you're natural).
I guess my mindset after losing all the fat was to change everything about my "old" self. That led to some poor choices, like the over-the-top tan and the bleached hair. I have no defense for the boxer shorts, except that my wife bought them for me and she liked them. Things settled down over time.