I think you may have overlooked the word 'if' in my comment:It doesn't matter how the plane looks like or how it behaves. What matters is that the lights are defocussed (just a tiny bit!) and this creates the blurry triangle (bokeh) caused by the aperture. So, the plane (or even UFO for that matter) in Luis video, is NOT resolved and therefore you cannot say anything about the shape of the craft.
Also, if we see these same triangles everywhere in the video, in the same direction, either these aliens like to align their crafts neatly, or it is... bokeh of stars....
if the 'triangle' is the real shape of the object
I don't myself believe it is the real shape of the object, but some people do, so it is worth considering the implications of that.