How to use Mixed Reality plugin?

I’d like to composite green screen video with UE real-time, I noticed there is a plugin which name is Mixed Reality. Seems this is the right thing meets my requirement, but I can’t find additional information of how to use it correctly. Wish you can give some helps.
Thanks in advanced.

Did you find a solution to use this plugin?

The only way I’ve been able to get mixed reality working on the rift to run is to build and run the Oculus fork. Details here