Let me say first of all that this is a great app that will save my life!
I'm working on installing it to test it and I'm actually interested in the 360 video theme/feature. Even if doesn't work with headsets, I'm still using it.
I would like to help developing a theme but I have exactly 0 skill in development.
But I know that you can use DASH streaming with three.js. I hope hearing that a theme for that is in progress! that'll be really great!