Everyone knows it’s hard to get college students to do the reading—remember books? But the attention-span crisis is not limited to the written word. Professors are now finding that they can’t even get film students—film students—to sit through movies. “I used to think, If homework is watching a movie, that is the best homework ever,” Craig Erpelding, a film professor at the University of Wisconsin at Madison, told me. “But students will not do it.” I heard similar observations from 20 film-studies professors around the country. They told me that over the past decade, and particularly since the pandemic, students...