Camera settings isn't that different from other cameras just because it's attached to a drone ... for night shots maximize the light intake by opening the aperture to the maximum, set a slower shutter speed but here try to avoid longer times then 1,5-2 sec due to the drone movements, other wise the pics will be blurry. If Aperture is on the widest & shutter to 2 sec. but still under exposed, rise the iso up to were you get a correct exposure to your liking. Then snap away ... take several pics on the same motif, probably you have to throw away nearly all of them due to blurriness but perhaps you get lucky & can keep a few.
The same applies for video except for 2 differences ... 1. try to keep your shutter double the frame rate (24 fps --> 1/48 sec.) for a more natural motion blur if you fly below approx. 30 meters ... on higher altitudes this doesn't matter. 2. you can't (shouldn't) use a shutter speed slower then your frame rate, meaning 24 fps --> slowest 1/24 sec.