Like who? Who has a hard time separating games from reality? Other than children, who should not even be playing those kind of games in the first place?
It says "M" on the cover. Don't buy the game for your kid and then complain because it's too gory when it TELLS you it's gory.
Although, there should be an option to turn it off.
EDIT: Just saw the video myself. You don't even see anything (as far as gore is related). Yeah, it's depressing but many games have depressing moments.