I love this app
It does exactly what it says. I use it to convert snare drum video files to audio so I can use them to practice. It keeps everything in a library of audio files so my tracks are all in one place. Im not sure if it will let me download them into my regular music folder (which would be a nice bonus), but even keeping them in this app serves its purpose.
TheStott about
Video to MP3 Converter, v1.3