1. download youtube video as flv file. (To download the video, use downloader plugin for IE. For IE, I have realplayer to do that for me. Alternatively, you can go to keepvid.com to get flv file.)
2. Once flv file is in you PC.
3. Use "flv2avi" or "ffmpeg" program to convert flv file to avi file. (http://files.filefront.com/flv2avirar/;6795056;/fileinfo.html)
4. Once you have avi file, you can use CoolEdit to extract the sound track.
