KissYouTube
1. Whenever you are watching video on YouTube, goto the address bar at the top of your browser.
Notice the URL is something like this:
http://www.youtube.com/watch?v=VKMm4XBsqhk
2. Just in front of the youtube.com domain name, insert the word 'kiss'.
Eg.
http://www.kissyoutube.com/watch?v=VKMm4XBsqhk
3. Press the 'Enter' key and it will bring you to this website. Click on the download link provided to save the video to your computer.
NOTE: Remember to save your video with ".flv" extension. Eg. some_video_filename.flv.
Then download the free flv player we recommend to play the video.
video tutorial:
http://www.youtube.com/watch?v=VKMm4XBsqhk
Mac users
YouTube Video Grabber is a Mac OS X program that will resolve the internet address for YouTube flash video files from YouTube Web page URLs and allow users to download and convert the flash video files to Quicktime MOV files.
http://www.versiontracker.com/dyn/moreinfo/macosx/33512