I just went into a brazilian server, where people have pings between 120 and 220 and recorded about 10 minutes of gameplay of good players (the ones with high scores who moved fast) and i saw nothing like in Unpi's recording. There's something totally wrong with him.
If you want me to, i can...
He usually plays on the mornings before 11 am (-5 GTM), you should take a look at him with spectator mode.
what i suspect with that sound thing, is that he is using something that moves his aimpoint to the next enemy (aimbot), that explains how he can kill so fast, however i suspect he isn't...