you can convert it to mp3 using this site:http://www.video2mp3.net/
(mp3 sound may not be the best but very convenient)
I enjoy the Etudes by Cortot, you can find and download a 1933 recording on archive.org:http://www.archive.org/search.php?query ... pe%3Aaudio
(other recordings featured on this page)
archive.org is a great site
lots of great classical pieces & opera can be found on youtube, apparently a bunch of amateurs uploading there!