My Background Music thing didn't work as expected. I had the audio sounding as I want it in Audacity, but after importing the audio to Camtasia Studio, producing an avi video file, then uploading it to ShowMeDo where it was converted to an Adobe Flash flv file, the background music seemed to be mostly filtered out.
For educational videos, I don't think background music is needed. Students can find their own background music if they want to. My music was probably too soft for their tastes anyway.