Very impressive video! Such sprites must have been seen at that altitude often enough in history, and as they're quite distinct from lightening I wonder if there is an historical record of them?
Yes, and that influence reaches far outside of the cities themselves. I only realized this after moving to rural Canada where on a clear night you would see the sky in a way that you could never see it within 30 km of any major city. It is hard to describe in words, you'd have to go up North during a cold winter night and lay down and stare upwards.
