KickYoutube

Here are the written directions as well...thanks BB!
One of the "easiest" ways to download a video from YouTube is through "KickYouTube". You will have an option to download your video in a variety of file formats …. .mp4, .mp3 (audio only), iPhone, .flv, etc.

All you need to do is ….
1. Find your video on YouTube
2. Type the word "kick" in place of the www. of that video URL > press the Enter key
3. Choose the download file format you want > click Go > right click on Down > choose Save Target As….

For example:
http://www.youtube.com/watch?v=9Va9ull44yw --- change this to…..
http://kickyoutube.com/watch/?v=9Va9ull44yw --- then choose the download format, etc….