We had a run of movies-about-movies lately: Damien Chazelle’s heady Babylon, Steven Spielberg’s The Fabelmans, and Sam Mendes’ Empire of Light. Of course, these aren’t the first and they won’t be the last pieces of celluloid (metaphorical or otherwise) to address the nature of film itself. The Artist, Son of Rambow, Ed Wood, Hail, Caesar!,…