So the only one I see myself being "skeptical" on is the one I shot through double doors and got the head shot. Well, let me explain it:

It's 2nd round in the video. I do my job, by rushing through and went to plant the bomb. No CTs. So I turn back to guard double doors and saw a guy in CT spawn. Shot at him a couple times. Then saw my teammates rush him so I knew my job was now to guard the middle double doors. I come across once and see a shadow then a death on radar. So I throw a grenade just in case a CT comes popping out. Poorly thrown but it's meant to keep the CT at bay if he were to come through the door. Then I cross the double doors once and see the back of a CT. So I cross back over and fire over the ledge at a pre-predicted spot I shoot at every round. It's the easiest headshot in the game. I hit him, round ends.
Now on the 3rd round, it might have looks weird only because the bomb is still sitting in spawn and a T just died there to a CT. So doing my job as a T, I go to guard the T with the bomb who happens to be chased by a CT who just respawned. I just sprayed and about the 10th bullet hit him in the head.

Need more explanation I'm sure to give it to you. Now back to my other max WCS3 server for more boredom.