http://www.mp3-box.org/mp3-from-youtube-video-mac/

Help with Downloading Songs from RealPlayer?
So I’m a crazy Muse fan and I decided that i want all of their songs including their Singles. I tried Frostwire but it had barely any of the song I wanted. Then i downloaded RealPlayer for my Mac to used today. After about and hour and a half of downloading songs, I added a crapload, from YouTube I hit convert on them all and saved them in a custom folder and waited another hour and a half for them to all convert. HOWEVER!, i ended up with all my song being videos not Mp3 in my iTunes profile. I looked in my saved folder and i have 2 of everything i downloaded, 1 ending in .flv and one ending in .m4v. I really want theses songs and i have no idea what to do in order to convert them into Mp3s. I am willing to re-download from YouTube cause i saved all the URL Addresses but i would rather just find a way to convert the files that i have. Thank you
hey use IDM (internet download manager) and use firefox when your youtube video is Buffering a button is popped up and say do u want to download this video if you press it it download video for u and use any player which you like to play FLV (youtube) videos
or if you want to downlaod videos in MP4 format use this website http://keepvid.com/
How To Convert Youtube Videos To MP3 Files (Mac or pc)