How to Play DVDs in Mac OS X Snow Leopard

DVD playback requires hardware; Fortunately, almost all Macs with Snow Leopard come with the necessary things to watch DVD. To play DVD movies, you need either a compatible internal DVD drive in your Macintosh or an external DVD drive with a FireWire or USB 2.0 connection. DVD-ROM drives can only play discs, while other drives, such as SuperDrive, can play and record discs. Any type of drive works fine for watching movies on your Mac.
Apple DVD Player app included with Mac OS X; You can find it within the confines of your Applications folder. But you can simply insert the DVD into the DVD drive. Your Mac recognizes the disc and plays the DVD player for you
The DVD player offers two windows:
Controller: Small, silver-tone interface, similar to a remote control, and contains all the controls for the player
Viewer: The big window where you can watch your DVD movies
In full screen mode, you will not see the viewer window. The video occupies the entire screen. The console appears as a opaque floating bar of controls along the bottom of the screen. To view the controls, move the mouse pointer to the bottom of the screen. Move the cursor to the top of the screen and you can switch chapters and go to bookmarks.

If you already use a traditional DVD player, you’ll be right at home with an Apple DVD player. Even if you’ve never used a traditional DVD player, you’ll find that it’s not much different than using a software-based audio player like iTunes.
You can think of a window viewer as a TV inside your Macintosh, if that helps, but DVD Player goes a step further. Unlike a TV screen, the viewer has a few nice tricks up its sleeve: for example, you can resize the viewer window using one of the four sizes listed in the View menu (half, physical size, double size, fit to screen, and full screen sizes). This is useful for watching a movie in a small window on your desktop while working with other applications. You can switch the size of the viewer from the keyboard; For example, select Half Size with Command + 0 (zero), actual size with Command + 1, and double size with Command + 2.
If you’re only using it for the entertainment factor, you’ll probably want to resize the viewer to fill the screen. If you want to make full use of all your screen space but leave the viewer window on the screen to resize occasionally, choose Fit to Screen mode with Command + 3.