Sorry for listing the link as private, stupid me. I meant to have it as simply unlisted. Should work now.
Player is using aimbot and wall hack. You can see at the end of the video, he draws down on a doorway. A doorway with no one in it. Seconds later, someone pops through the door. No way he could have known they were there.
Also the fact that he goes straight to the enemy hiding behind container without the player being spotted.
from what i can see, he is checking his corners and playing fairly normal. there was no tracing people through walls or anythings that leads me to believe he is wallhacking.