“Retirement Plan,” directed by John Kelly and co-written by Kelly and Tara Lawall, rests on a straightforward structure—a man’s list of ambitions for life after he stops working. And yet, in the film’s seven minutes, that list, narrated by the actor Domhnall Gleeson, takes viewers on a journey, humorously illustrating necessary tasks, aspirational hobbies—hiking, bird-watching, yoga—and life-enriching activities for which he imagines he’ll finally have time. “It feels surreal that ‘Retirement Plan’ has found such momentum,” Kelly said. “Perhaps the most surprising thing has been the emotional responses, with many people telling us how watching made them reëvaluate their lives.”