He analyzes the way in which intense experiences such as sex or violence, which our mind fantasizes as it cannot deal with them directly, are expressed, as fantasy, in movies. I recommend The Pervert's guide to Cinema which you can view free on Vimeo.
It was easy to misunderstand you as saying that people "deep down" enjoy violence in all contexts, even on the news when you see someone defenseless getting victimized. I wouldn't approach the question from that point of view at all as I don't think it's true.
If we are looking for the "grain of truth" that lies in all points of view, then here goes: Somebody who is in a very dangerous situation, can be taken over by adrenaline. Likewise someone witnessing violence might in some or many cases get a lesser but similar reaction. Adrenaline could, by someone wanting to make a very eye-catching and controversial point, be described as "enjoyment", but I think it would be more of a mystification than a clarification.