I have no idea what the first post is about, but the "mod" on the youtube video is made by me. It is a little project I have been working on a bit for a while now (rendering a custom cockpit). Most of the actual hornet cockpit functionality is missing, wrong or incomplete including most of the mfd pages, almost all of the switches/knobs do nothing, radar, rwr, navigation etc. do not work and so on.
The cockpit is rendered and handled using a D3D hook, basically the original cockpit is hidden and another model is drawn instead. All the switch actions and mfd/hud rendering is done in the lua exports script. It doesn't use anything from Black Shark so that is why the behaviour probably is a bit different in many places. The base cockpit model is made by another guy, it is intended for ArmA 2 which is why the detail level isn't on the typical flight sim level (also my renderer doesn't at least yet handle normal- or specular maps and the FC2 lighting is not very suitable for it), though I have added some more detail in the side panels and some other switches/buttons.
I dont know if it ever will be in any kind of "complete" state, it depends on how much free time I have and how long I have interest to keep working on it. What is possible is also severely limited by what is offered by the exports interface so many systems are very difficult to get to function at all.