[jaredsohn]

I have been working on an alternative solution for the same problem (for at least some use cases) which should work with less hassle.

Basically, with my program (http://www.mute.fm), your music will get paused/muted automatically whenever a video plays and will be restored afterward by monitoring the volumes of different processes.

This doesn't support the use case of needing to pause your music when you have a real life phone call, need to leave your desk, or have people gathered around your computer, though.