Adds a MP3 Download button next to the subscribe button, thanks to youtubeinmp3 for their simple download service (http://youtubeinmp3.com/api/). Based off ninjasuite code. Just convert to direct download link.
< Opiniones de Youtube MP3 Direct Download Button
Greasemonkey won't detect/prompt to install this script
I have no idea why, or what's different about this script compared to others, but Firefox just opens this script raw, and I can't get Greasemonkey to give me the installation prompt for it.