CAJUN ACCORDION DISCUSSION GROUP
There's lots of software to do these jobs. Ask Mr Google what you wish to do and hey presto.
You can also go to www.keepvid.com and past the url of the YouTube video in teh form. It will provide you with links to download the ORIGINAL video file, as well as several other options AND an MP3.
there is also a site to just grab the audio track from a youtube http://www.listentoyoutube.com wle