For his captivating new documentary, video maker Spencer Nakasako turned over a camcorder to Kelly Saeturn and her boyfriend, Tony Saelio (both pictured), to record a year and a half in their lives. At 17, Kelly is a bright, pretty Oakland-area resident graduating from high school and looking ahead to college. But earlier she had met Tony, a beefy 24-year-old ex-con, who like her is an Iu Mien refugee from a hill tribe in Laos, and has become pregnant by him. What emerges is a portrait of an articulate young American woman who is caught between two cultures with conflicting values and priorities. It also suggests that the camcorder has allowed both Kelly and Tony to unload their feelings freely and thereby better communicate with each other (KCET early Monday at 12:30 a.m.).