Radicalized by the civil rights movement, Marion Stokes recorded television newscasts relentlessly from 1979 until her death in 2012. This documentary chronicles how she amassed a collection of 70,000 cassettes but also became alienated from her family. It screens at 7 p.m. today at the Cleveland Museum of Art. Tickets cost $10, or $7 for CMA members. (Niesel)