It could be him, or it could be some video he found and claimed as his own and posted. I think there's a good chance it's him in the vid, though I'm not convinced it's not staged. I also think the Jack character in his blog is an alter ego based in the imagination of a witty guy.

Whoever writes the IHateWhores blog is hilarious, but the stories can only hold water behind the veil of anonymity. As well, the stories always seem to wrap up a beat too neatly in his favor and the people in the stories always seem to bend at his will too conveniently (despite poking fun at himself getting thrown out of places, etc). I think the skeleton of a story is based in truth (like going to a gym and thinking about all the funny stuff that could happen) and then his sense of humor fleshes out the details.

Some suspension of disbelief is required but it's still a fun read in a great style. If I'm wrong that's even better because I'm really a fan. Hopefully he gets back to it ASAP.