I don't watch kill cams they're very often ridiculous and not what the person who killed saw either. The truth is somewhere in the middle, so I just avoid the frustration.
I don't watch them very often, but when I feel extremely cheated I will watch them. It gives me a better (not perfect) look into what actually happened.
I have never raged as much as I have in this game. Last night I was stomping the other team. I was using UAV - VSAT - Warthog and I got the Warthog twice in one life. I was annihilating the other team and had something like 10 captures in Dom just after half time. The other team was starting to quit and finally the host migrated...to me. I didn't kill another soul the rest of the game. My Warthog was still cleaning up for a bit, but I couldn't kill anything. No matter what the circumstances were or how much of a drop I got on him. I was useless after getting host.
This is a problem. More than half of the other team was the same, but some people are trying to tell me that they got 100x better in half a second or that I lost all of my skill over that time period? I don't believe that and it's painfully obvious when you are getting screwed over in this game.
GT: Chicken8or -Epic Halo 4 moment below!!! http://www.youtube.com/watch?v=HW2_eKmm7o8