If you're accustomed to combat footage or other videos of victims of violence, this is pretty tame in the grand scheme of things that people are subjected to.

For those who want to know without exposing themselves: He's sitting in a chair when he takes a round to the neck. Clean exit. It's over within three seconds.

I watched the video of the Christchurch shooting and while I don't regret seeing those horrors, there is a particular moment of it that is so horrifically callous that it sticks with me and is particularly haunting (for those that know; its that moment near the curb).

I agree, r/combatfootage has more gruesome videos than this one.