Spoilers if you havn't watched the video....
I think that lay down is what makes that guy a great poker player (I guess -- I've not heard of him, but he's on TV, right?) and why I'll never be on TV or even beat my home game. I am NEVER laying down that hand either.
Like you, I have no idea if that was cash or tourney, how much he's giving up if he goes out there versus beats one more person, etc. In a cash game you probably call, because you can buy back in. In a tourney though, where each place means more money, I think almost all of the good players fold.
Amongst really good players (and if that's a final table, or a pro-series, I'll give them the benefit of the doubt), a raise in first position, followed by a reraise followed by an all in, with 3 guys left to act, is almost always gonna result in someone having aces. I'd never fold that, but I'd be wrong. The $5 sit and go's on-line are full of people who would call all 4 of those guys with their A-x suited. But at those stakes, those raises mean something.