Yeah, thats darksydephil. He's actually a pretty good Super Turbo player, competing in EVO. He might have even won it before, I'm not sure. He's also a whiny bitch though. He posts every SF match hes ever played on Youtube for some reason. If he wins he talks shit about the other player (this is a high level player talking shit about people who clearly haven't played the game that much keep in mind). If he loses its always the same shit like in the video you just posted. I've watched a few of them and he can never admit when he gets outplayed.
Honestly, hes probably right sometimes. Sometimes you play someone who you can just tell you are better than but lag issues mess you up. But every time? No, sometimes you just get beaten. And if you are losing a lot because of lag, well, welcome to online gaming genius.
My guess is he's probably not making the transition to SF4 as easily as he thinks he should be. If he competes at EVO this year no way is he going to win. He wouldn't stand a chance against Justin Wong or especially if Daigo comes over to compete.