Honestly, that first video isn't even that impressive. The video is just getting a lot of attention because he got the last kill of the match.
I don't mess with the throwing knife but my friend does and has way more impressive kills with it. And his are actually calculated and thought out. And I've gotten absolutely absurd sticks with semtex that smash all over that knife kill.
But whatever. Cool for the kid to get his 15 minutes. I hope he put AdSense or whatever on that video.