This is nothing like public surveillance, just as Google's use of tracking cookies is nothing like having a random stranger look over your shoulder and stare as you search the web.

This cameraman walks up to and harasses specific people. When you are in public, and there's a surveillance camera, you aren't being targeted specifically. You're no more interesting than anyone else in the frame. Moreover, it's highly unlikely that anyone's full-time job consists solely of watching the one camera that happens to point towards you. Maybe there is a guard watching an array of a dozen cameras. The unit of human attention directed towards you is much, much less.

Furthermore, a creepy guy holding a camera is a very different type of potential threat than a camera mounted on a wall. The people filmed don't know that he's just going to film them. He could begin mumbling erratically, ask them for money, or even physically attack them. All of these possibilities are especially likely considering he already violated social norms by wordlessly coming up to them with a camera.

I don't think this demonstrates anything about surveillance. The guy is a jerk and I found myself empathizing with his victims. I don't buy the point he's supposedly trying to prove.