Originally Posted by
212man
Clearly a helicopter from the background noise - turbine whine, gear meshing and blade slap.
Yes but the blade slap, that is typically in a moderate descent during a turn (vortex of the preceding blade hitting the following blade)
the aircraft seem to be in leveled flight at that time. Drone footage is typically made of short frames duration since by regulation the drone must remain in the line of sight the operator.