Apple QuickTime Video Viewing Software
If you cannot see or hear the video files properly, you will need to install the Apple QuickTime plugin.
Here is the source website for this free software, this link is for a version which will work on all PC operating systems back to Windows 98:
http://www.apple.com/support/downloads/quicktime651.html
If you have a recent PC, and would rather install the latest version of QuickTime for Windows, go to the Apple website to this page:
http://www.apple.com/quicktime
The latest version of QuickTime for Windows no longer supports Windows 98 or Windows NT.