Corush, if there are videos on Youtube that you want in MP3 to put on the cd player why not just download the .flv file that Youtube uses then just convert it to MP3, takes about 30 seconds or so to do after the youtube video has buffered and you've install the tools.

Get firefox if you don't have it already>Install the video downloader browser add on from below page> click to restart the browser> go to Youtube and buffer up whatever video you want> then click the video downloader tab in bottom right of firefox as shown on download link below> Save it to desktop then go to it and rename it to what you want with .flv at the end>

http://www.mozilla-europe.org/en/products/firefox/
https://addons.mozilla.org/en-US/firefox/addon/2390
http://www.flash-video-mx.com/flv_to_video_web/

Then download the TRIAL of Moyea flv to avi/mp4/mp3 convertor which you can use the mp3 part of without limitations (video has watermark until you register), install it and once done go into your programs list and choose the Video convertor not .flv downloader, go on settings and change export type to MP3, choose save to desktop then click convert and its done.

I've got quite a few of the old bootlegs to audio of my favourites bands this way.