Free YouTube to MP3 Converter
allows you to extract and download all videos from YouTube. You just need to copy and to paste the URL of the video. The audio files are saved as an MP3 (high quality, optimal, standard or economy) or a WAV file in "My Documents" on your computer and the name of the original video is preserved.
Before using this software, make sure that you have the right to download the video and the audio track. Many videos are protected by copyright laws.