The usual way to fly proximity lines is in daylight over empty lots or open ground. This build goes the other way entirely: a night flight through a dense downtown cityscape, close enough to buildings that the whole thing feels tighter and more committing than the standard daylight session.
The rig itself is compact. The maker flew a Nexa 3.5 with the DJI 04PRO camera counted in the weight, and the whole setup stays under 250g. Fitting a full digital camera inside a sub-250g budget seems like careful planning to me, since every gram matters when a quad has to stay nimble this close to structures.
The line is what makes it. The drone climbs above the glowing crown on top of the US Bank Tower, flips inverted mid-flight, then drops into a steep vertical dive straight down the side of a building. The pull-out happens near street level, and the flight levels off along the lit avenue below. That dive-to-pull-out sequence reads as precise, controlled flying rather than luck.
One thing stays open. Flying over roads is illegal, and this route follows a city avenue. How the maker squares that has not been explained. Security personnel on the ground did not pay attention to the flight, though I would not treat that kind of inattention as something to count on.