Actually it's not auto-aim at all. It's simply aim-assist, where the user is defined to aim themselves, but also has help from the aim-assist. As soon as it catches an enemy from, say, within 15feet and about 2 inches out of the cross-hair, it automatically aims towards the enemy. Its what all COD's have on consoles. PC doesn't have this because it's not made the same. PC has some advantages and disadvantages over the consoles gaming. This video ^^ was done on Xbox 360 so ofcourse he would have the aim-assist.