download audacity. go to volume options in your bottem right , or control panel. recording. select stereo mixer. Then open audacity go to recording option and turn on stereo mixer. click record. Then play the video. When your done export the audacity file as a mp3 and there you go, audio file. There might be an easier way but this is one way.
get goldwave open the video as you would any other file and save it as an .mp3

job done
Quote by david_highland
Uh oh......you just had to go and piss off danielrobbyshor, now we're all ****ed.

Quote by Grundy0
How can an orgy be 'Nazi-style'? What did he stop halfway through and incinerate a jew?
get a flv downloader (I use youtube downloader)

and then get a audio extracter (AoA audio extractor)

and your set, all the apps are self explanatory
Quote by somethingfunni

what do u like better. doing your girlfreind or doing jesus?
the answer to that question should never be 'doing jesus'

Quote by Miggy01

I was looking at porn at the computer froze
I use videoget - downloads from youtube (and others which don't matter to me) and converts to many formats including mp3