Yes, I wasn't sure about the aimbotting, because I saw no snaps. But when he is clear and has without doubts such an incredible aim, why should he use a wallhack? I don't understand cheating...
Yes, he can't avoid nades, has not a good movement, and is more or less a camper... But his aim isn't bad in my opinion, at least it's efficient. The most bullets hit, also on wide range, and he can follow the targets very good, that's why I suspected aimbot.
Even if he is clear I personally would rather keep my style of gaming than playing like him.