Hello, yes, I know how. I've been using this site, http://getmp3.pro , for a while now. It's very handy. Open needed video on YouTube, copy link to it, open the site, paste link into a window and you get the mp3 format. It's easy enough, and most importantly, it can help you collect the material you need even if it's on YouTube. Can be very useful in various situations, so I'd recommend giving it a try.