In reply to the posts above, the videos are coded in flash.

If you use a web browser like Firefox (2.x onwards) it has a default Adobe flash player plugin as standard. The videos can be played within the window.
The plugin is available from here: http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash and supports both XP/Vista and IE6/7 & Firefox (and many other browser/OS configurations)

If you wish to use the files offline then the current version of Windows Media Player supports these .FLV file extensions. You will probably recieve a warning that the file format is not supported, however click ok and it should play anyway. ;)

Alternatively the best multipurpose player is VLC available here: http://www.videolan.org/vlc/

Hope that helps

BTW: Love the larger videos!