Tony Oursler’s widely celebrated videotapes and installations create a bizarre universe, blending childlike props, miniature sets, fragmented body parts and strange optical effects into discontinuous narratives with ominous political and psychological overtones. Tonight’s overview of his single-channel tapes includes the recent Halloweened, Tunic (Song for Karen), and Kepone Drum. Cinematheque will co-sponsor Oursler’s Installation Dummies at The Living Room through March 23 .