4.14 VIVE Fullscreen

Hi, there.
i want to make Fullscreen on window

deleting black side, making wide screen.
so, i find a solution.
but it doesn’t work.
please, tell me why it doesn’t work and how can i do.

I have not done this myself, but last I read up on this I heard the only way to do it was to modify the source code of unreal engine and re-compile it as shown in your video. Correct me if I’m wrong somebody as I would actually like to know the answer to this also.