Theres a 737 pilot with his own youtube channel called "mentaur pilot" or similar.
He does 10 minute videos answering such questions as
Why are the wheels exposed on a 737?
Why are the bottom of the engines flat on a 737?
also non 737 questions like
Why dont we give the passengers parachutes?
what does those flappy things on the wing do?
Its interesting enough i find myself going back for more ...