First off let's establish one thing up front, cats are nuts. And no, I don't mean the tasty, crunchy treat, I mean they all suffer from some form insanity. I say this as a cat owner. In my life I have known, been adopted by, or just simply been around many cats, and they are all a bit touched in the head in one way or another in varying degrees.
Before making this post today I was reading some of the comments below it on YouTube and the one thing that jumped out at me was how concerned some people are that this cat has been terribly abused and that's why it's reacting this way towards someone in the room. Here's a news flash for you: Cats don't need a reason to act bonkers, they are. Please don't jump to conclusions about a situation you know nothing about. This cat could just simply be nuttier than most.