Ben;
Looks a bit like an array of drones.
https://www.youtube.com/watch?v=aOd4-T_p5fA
Or...
It could involve some weird air inversion or mirage. If parking lot lights on shore are transmitted and bent or mirrored back that might explain it.
https://atoptics.wordpress.com/category/air-mirages/
(has Pictures of the Green Flash!)
Methane Gas/ball lightning?
Could be associated with a release of methane gas in the costal areas off of the Outer banks resulting in ball lightning?
https://www.youtube.com/watch?v=D1Mx3g0JmQU Methane.
(I Would suggest that the leak from the hydrate would have to be substantial to make it to the surface!)
https://www.youtube.com/watch?v=D4vV3KxQ16c
Some examples of multiple ball lightning!
It’s the Saltwater Redneck.