Antkind by Charlie Kaufman

B. Rosenberger Rosenberg, neurotic and underappreciated film critic (failed academic, filmmaker, paramour, shoe salesman who sleeps in a sock drawer), stumbles upon a hitherto unseen film made by an enigmatic outsider—a film he’s convinced will change his career trajectory and rock the world of cinema to its core. His hands on what is possibly the greatest movie ever made—a three-month-long stop-motion masterpiece that took its reclusive auteur ninety years to complete—B. knows that it is his mission to show it to the rest of humanity. The only problem: The film is destroyed, leaving him the sole witness to its inadvertently ephemeral genius.