Since the other videos shot in the cabin don't show a pitch black cabin, my guess (as an ex professional cameraman) is that this most recent video was shot on a camera that had the exposure set to manual, and on a high f-stop (the digital equivalent, obviously). But now I am speculating, which is precisely what I whinged about others doing just now..
And my apologies, MrSnuggles, I wasn't barking at you in particular. I wasn't really barking at all...