I'm unclear on what you're referring to by a movie, but if you mean to restrict certain sizes, say give something a max or min width/height, there's no built-in way to do this. However there are some ways to do this with code; please see this post:
If you're just looking to restrict a movie from going fullscreen, I don't think there's a way to do that, but you could at least hide the video controls via the video options in the element inspector.