A humorous glimpse into the frantic world of filmmaking, where there’s no room for writer’s block and deadlines loom large, “Gambler” chronicles filmmaker Nicolas Winding Refn’s struggle to clear a personal debt of DKK 5.5 million after Fear X becomes a box-office flop. Despite grappling with the notion of artistic compromise, Refn must navigate the complexities of securing funding and balancing family life while filming in the Copenhagen underworld.