I can't imagine a problem with this - there are dozens of retail DVDs and videos with names like 'Flight In The Cockpit' which are multi camera shoots of flights. I've seen a couple and they tend to use at least four cameras, known as 'lipstick cameras' cos they're about the size of a lipstick, they come with very durable mounts and certainly don't require a camera man.
In fact there's a Martinair MD11 DVD which covers a flight from Amsterdam to Florida which is spread across two discs. My DVD of Once Upon A Time In America isn't this exhaustive.
I don't think these titles are made for professional use but I don't doubt there's plenty to learn from them; and if an airline were to start producing them for training it would be a very simple film to originate, as far as I can tell there are plenty of people already making them. Plus the airline could sell them for £30 a pop through the back pages of Airliner World! As long as they don't have dodgy sub-porno music soundtracks, as seems to be de rigeur for spotter flicks.