In 2012, Jamie Benning completed a masterpiece: Raiding the Lost Ark, a feature-length behind-the-scenes look at Raiders of the Lost Ark. Combining various existing "making of" documentaries and interviews, Benning has the final word here, giving us an unbelievably detailed look at the creation of the film, how it changed from script to screen, what happened on set, and even how Porkins from Star Wars appeared in Raiders. Yep.
Note: Raiders of the Lost Ark is 115 minutes long. This movie about Raiders is 143. Tune in, my fellow movie nerds:
If you like that, Benning has a bunch more, including explorations of Jaws, Star Wars, The Empire Strikes Back, Return of the Jedi, and various Back to the Future interviews.