You cannot count on manned aircraft to be at 500' AGL. See post #5.
Even with structures of known height nearby, it's extremely difficult for observers on the ground to accurately estimate the altitude of aircraft, even low flying aircraft. Your...
They don't need to share lens sizes, image dimensions or resolutions. You can even mix in still pictures. You just do it all with your video editing software to make smooth transitions and adjust views.
I've owned various drones for several years. I just recently upgraded to a DJI Air 3S and for various reasons, I decided to "go legit". I registered the drone with the FAA (I usually do that for my drones) and I finally took and passed the 107...