"...as backgroud music for a non-music related video."

Khandu your humility is almost embarrassing. I watched the video. Your music is a significant part of the work. As Stewart said, you should be acknowledged, and they should have asked your permission. As it turns out the work is benign, but it could just as easily have been pornographic, facist, etc, what then?

(NB - I'm not for a moment suggesting your music lends itself to these pursuits, but you never know what people will do - Look what Manson did to Helter Skelter)