Bouncing the weights is a lame way to do it, but that dude is one strong motherfucker.
At that kind of weight it seems pointless to comment on form or anything else. Beastly lift. That guy is a machine.
I guess, but it's just easier to lift the weight when it's bouncing up off the ground, no matter how much poundage is on the bar. It obviously doesn't have any bearing on the guy's strength or performance, but you can see a difference in the techniques when you watch this video and then Andy Bolton's.