On the (Main Menu) highlight the (Play) option and press the [Up] arrow key on your remote control. This should highlight one of three clips available on that side of the screen, all of which can be activated by pressing the [Enter] key.
Now, highlight the (Subtitles) option on the (Main Menu) and then press the [Up] button once more. This will give you access to two more hidden clips. Finally, go to the (Special Features) sub menu. Highlight the (Commentary) option and then press the [Right] arrow key on your remote control. This will allow you to view even more clips