Here are two tools to download video in flv. format from Youtube.com.
Youtube Grabber is a free tool that downloads FLV files from Youtube. Simply copy and paste the URL of a video from Youtube into the program, press grab OR enter, and the file will be downloaded into the same directory as the program.
Download: Youtube Grabber + FLV Player
YouTube Video Downloader
Download movies from YouTube fast and easy with our free tool.
Download: Youtube Video Downloader