Screencast in rubyonrails.org

i have something problem with screencast in rubyonrails.org. I only
hear speech, but not have image.("Creating weblog in 15 minutes")
(Windows XP, klcodec 2.82f)

If this is "rails_take2_with_sound.mov" you'll need to install QuickTime so that it installs the Apple Animation codec that the video uses. Then you can view it in any player that understands the QuickTime container format.