This video proves inconclusively that actions speak louder than words.
My guess is that this guy has some serious self esteem issues, which links in with some anger issues. I would say he is somebody who could do with a bit of help, however it is a transition he has to make and would need to identify that he has a problem in the first place. Given what he said in the video, I seriously doubt he would identify that he has a problem. It is also classic projection behaviour, he is angry at the world, sees somebody who has had a minor conflict with them and because he has a habit of projecting his personality onto others, so therefore picks a fight with his own image.