To avoid glitches in web video
  playback:

  Click on the Play icon, then
  click on Pause, until the video
  has completely loaded.  Then
  Play and enjoy!
 
  * All video clips have been
  compressed for web playback,
  and lack the quality of the
  original, full-resolution videos.

 If no video player appears
 goto
 http://get.adobe.com/flashplayer/
 and follow instructions
 for a free downloadable
 player