Which version did you find? If you like, you can convert it to MP3 with https://www.yout.com. Just paste the video URL in the edit box on the home screen, then choose what format you'd like to convert to, give it a title, check or uncheck the boxes for "Normalize" and "Remove Silence", then press "Format Shift To", and bing bang boom, your converted file will start downloading. I've used this site for many audio conversions, and it works wonders!