Great finds & video! I’ve seen that new Nordyne before where I went to college; the one I’ve seen is a Gibson. Actually replaced a new Williamson unit that less than a year prior replaced a York tabletop. Also I have a video of several of those old Heil quakers near where I am with the more square shape running (early 70s or possibly late 60s) I can send you if you want.
my older brother also lives in an apartment complex with his gf, and most of the units there are rheem and goodman units. i think i got a shutdown of a rheem one time with my phone