Convert+YouTube+Videos

[|**http://blog.zamzar.com/2007/02/16/support-launched-for-youtube-video-conversion/**]
 * Convert YouTube Videos using Zamzar**

You can also use this site:

http://keepvid.com/

Quicktime will play the videos, though you may also have to download the free .flv player from http://www.applian.com/flvplayer/download_flv_player.php