probably because he is coming at the rail for the right side, which would make it a lip if he slides it left foot forward because he is still gettin he tails over the other side of the rail. You dont need it to be urban style for a lipslide.
well then define lip, lip is when you get your tails over the other side of the rail, just as he is diong here, to hit the rail, it doesnt necessarily need to be ollie up. Sick by the way.