Flash gives you some flexability for how your movie is presented on the user's screen, but not a lot. Here are some additional methods for controlling the look of you movie.
The options shown here are not everything there is available. In actual use, you will probably want to use a combination of several of these tools for your site.
This first section shows various ways to set the size and the position of your movie in the browser window.
This section shows various ways to adjust the size and the location of the browser window itself on the user's monitor screen.
All of this content was produced using Flash CS3, Photoshop CS3, and BBEdit 8.7. If you are interested, the source files may be downloaded and are free to use and adapt as you like.