Great video and channel! I subscribed.
I had seen a similar analysis of Doom's mechanics but this video did a much better job of communicating it and I got a bunch of new ideas. Thank you for sharing this.
While it is a shame you don't have a headset, just remember that like every technology they'll start coming down in price and size at the same time as getting more sophisticated. I bet the VR headsets everyone will have in a few years will not only be cheaper, they'll make the current ones look like toys. It is very early days for VR so there's no hurry! :D