The size of the Macromedia Player application is set to 640 by 480 and doesn't have a window bar to drag the window around. It is meant to fill the entire screen of a 13" monitor. If the application is played back on a larger monitor, it will appear centered on the screen, but will also have no window bar to move it around.
In other words, this window cannot be moved around on the screen regardless of how big the screen is. This is the way most CD-ROMs created with Macromedia Director work.