What is this really about?

On the surface it’s about a creative challenge, but it might be a study of two filmmakers. Lars Von Trier seems cruel and his films are full of cruelty, but they are also ultimately human.

At the end, Lars admits to perhaps trying to bring Jørgen Leth out of a slump or a depression but also that in trying to be Jørgen’s saviour he is rescuing himself, or that part of himself that is like his idol.