Well, i Watched the demo, Frankly I didn't finish it all, but in the first 2 minutes i saw a 100% wallhacker, he aimed many times on the ct's behind the walls/blocks, but he is too smart, he is hacking smartly, he doesn't benefit from all the hack, what i mean is he tries to shoot Through walls/block for a only a few time, so that it seems only checking.
He did a few Pro moves that he pretends of Not Seeing a player Through walls even though he did saw them, you can see that when his "Cross" corresponds the ESP which is the blue player (CT)
Another Thing I Realized that seemed tricky, That I saw a shot without even aiming using SNIPER ,, he just turned and shoot and he killed, Where Obviously this is a clear reason for banning you.