Doom 2 a scary game?
As the video starts it shows gameplay footage of the computer game DOOM II, the player starts killing lots of enemies, but then at 0:58, he kills an Imp, then the screen flashes and a text appears saying "Take a close look in that monster's ass!!!", which apparently, zooms in the monster, implying that you can see its anus. It starts zooming a lot before at 1:17, it shows an image of a girl with a ugly face while the song B.Y.O.B by System of a Down plays with a distorted effect layered over it.
NOTE: The following video contains a screamer!