Nice. I was just wanting to build my own backend for something like this without having to hassle w/ my own setups for HLS/DASH/chromecast/whatever. I would suggest a bit more documentation or at least overview material on how it looks wrt showing a catalog or other user input features beyond pure playback.
As a developer at a media company, I know first hand, the effort required to bring streaming video across all the disparate platforms. Even if 50% of what is promised works out great, it will be a fantastic product for every media company.