Thanks for sharing your progress. Great news about the update.
The code base you are looking at is a bit old and using MotionJPEG.
Another strategy could be to use the plug-in API.
With the Hololens, is the only way to get the video to the headset through Wi-Fi?
This technique of using an external signalling server might be a fast way for you to get something going.
As you’re in Japan, you could try and contact the team at TwinCam Go, Tokyo Metropolitan University. They may be able to give you some tips with their project.