How to download a video from youtube to my computer?

I want to download a couple videos for a project.I'm planning on using the Snuggie infomercial so I can also use Google videos. I'm not going to steal the Snuggie infomercial or anything. There is going to be a disclaimer at the end of my video so no worries :) There's a simple way:1. download TubeHunter Ultra from www.neoretix.com2. open the video page you want to download from3. click convert flv to mp4 "download"TubeHunter Ultra will download videos and directly convert them to popular video formats for Windows Media Player, Ipod, Mobile, Zune, PSP,Windows Movie Maker...youtube download flv What's more, it supports over 1097 youtube-like websites including yahoo and hulu...