The Nouvelle Wave-inspired “Sleepless Nights” put Marczak on the fiction film track, until a chance encounter on a river one night. During the introduction of the second Sundance screening of his new film “ Closure, ” director Michał Marczak , in reaction to an audience question at the film’s premiere, wanted to make sure the audience understood the film they were about to watch was a documentary. “None of the scenes were staged.” It’s a clarification that turned out to be necessary, as the