The Deathcam, also known as the Freeze Cam, is a gameplay feature that activates upon death. When you are killed, the camera zooms in on your killer (in the case of assists, the one that dealt the fatal blow;...
Deathcam - Official TF2 Wiki
I'm aware that disabling the Deathcam will put me at a disadvantage, as I won't be shown the location of my killer, but I would personally rather play without it.