My take on the railing/ramp section. Four sides done similarly to the video, but with a couple of tweaks (ramp not running into entryway on two sides, and stopping at the top step on the other two sides).
Eevee:
Cycles:
Biggest pain was getting the top of the ramp section aligned with the sloped section of the room at the top…if I’d remembered about the ramp, I’d have put a loop cut in much earlier so I had something about the right height to snap to. Oh well, hindsight and all that 
