If the Player is unable to play back a particular video clip because a codec is missing, you should see an error message in the following format:
Video not available, cannot find 'vids: XXXX' decompressor.
where XXXX is the official Four-Character Code (FOURCC) that uniquely identifies video stream formats. You can use that code to search for an appropriate codec at Dave Wilson's well-organized site,
http://www.fourcc.org If your hunt is successful, follow the developer's instructions to install the codec.
If you don't see visualizations in Now Playing, choose View, Visualizations.
If No Visualization is selected, choose a different menu option. Also, note that the Player cannot display visualizations during playback of MIDI files, and visualizations might not work for CD tracks when the CD drive is set for analog playback.
Taken From Microsoft Windows XP Inside Out 2nd EditionWritten by
Ed Bott Award-winning computer journalist.
Carl Siechert Windows documentation expert.
Craig Stinson, Contributing Editor, PC Magazine.