Rotation: Horizontal plane of rotation.... body stays pretty much vertical and the board never goes over your head. A pirouette.
Flip: vertical plane of rotation..... the board goes directly over your head.
Roll: A rotation done in the vertical plane while your body is horizontal or inverted off axis. If the board doesnt at least reach the same height as your head, its just a rotation.
Technically in the video his first rotation is just that and his second is a roll, but you usually give that the benifit of the doubt and just call it a double roll.