AI WEIWEI: NEVER

SORRY  Alison Klayman’s documentary about the Chinese sculptor-provocateur is one of the most powerfully engaging movies of the year. A bear of a man with a caustic sense of humor, Ai’s a culture jammer who began as an artist with political tendencies but has become an activist who happens to make art. In Mandarin and English, with subtitles. (MPI Home Video, $24.98; Blu-ray, $29.98)