Adobe ACROBAT READER 7.0 Manual page 202

Setting Multimedia preferences
You can select the preferred media player to play movies and sound 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. You cannot add media clips using Adobe
Reader; Acrobat Professional is required to add movies and sounds to a PDF document.
To change multimedia preferences:
1. Choose Edit > Preferences (Windows) or Acrobat > Preferences (Mac OS), and then
select Multimedia from the left side of the dialog box.
2. From the Preferred Media Player menu, select an option to determine the default player
that plays media clips.
3. Under Accessibility Options, select which special features are allowed to play, 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