Not anyone can see the idea of this video,or it's just ignored.The guy in the video is searching the person that did him those bad things,as the song says "time to understand the horror".In the end of the video the guy gets killed by himself,which means "the horror" that he was looking for is actually him.From all this we can understand that every person in this world,besides the good part has a bad part too and can do bad things to other persons,even to themselves like in the video.