https://splice.gopro.com/v?id=7zb5oj

[skipSmith]

What settings do you use to balance light differential between sky & ground?

 

[Cymruflyer]

There isn't anything other than a graduated ND filter, so dark at top and clear on bottom, but then you are forced to keep the top half of the sky in your frame, the same amount as what your graduated filter shows, which is not really the best thing to do in a well composed aerial shot. Generally there is too much contrast difference between sky and ground, to try and equally calibrate them to be the same in value.

This is easy to do with a still image, but not with video.