Adobe ACROBAT READER 7.0 Manual page 59

Setting Multimedia preferences
You can select the preferred media player to play sound and movie clips, determine
whether the Player Finder dialog box appears, and set multimedia accessibility options for
visually impaired users. For example, some movie clips include subtitles, dubbed audio,
or supplemental text captions. You can determine whether these items appear when the
movie is played in your Adobe PDF document.
To change multimedia preferences:
1. Choose Edit > Preferences (Windows) or Adobe Reader > Preferences (Mac OS), and
then select Multimedia on the left side of the dialog box.
2. From the Preferred Media Player menu, select an option to determine the player that will
play the media clip. The menu displays currently installed players.
3. Under Accessibility Options, select which special features are allowed to be played,
specify the preferred language for the media in case multiple languages are available, and
then click OK.
For information on setting multimedia preferences for trusted documents, see
Trust Manager preferences.)
Setting