1) You have the YELLOW, RED and BLUE squares. -YELLOW is to pause. -RED is to stop (Then a green rectangle appears and that is to resume) -BLUE is to play your own video (Read instruction after clicking it)*** 2) You have other buttons that sync videos, play them on HD, put them full screen and enlarge the small video window. The rest of the things are easier to know what they are for. Enjoy