Apple TV/FM Radio System - Manual (Page 109)

Use as small a size as you can: The amount of disk
storage that a movie takes is directly related to the size of
the video window—the larger the window, the more disk
space you use. By choosing Smallest Size from the Windows
menu before you record, you may be able to save more than
50 percent in storage space. (A movie that uses about
75 megabytes per minute at the normal video window size
will use only about 35 megabytes per minute at the smallest
video window size.) See “Changing the Video Window Size”
in Chapter 8.
You can open the movie from within any application that
supports QuickTime, such as SimpleText. (QuickTime is a
system software extension that comes with your computer.)
102 Chapter 7