Revelatory archive footage found in a Swedish basement distinguishes Göran Olsson’s documentary, which, like most mix-tapes, offers crackling content even when its contexts aren’t clear. Traili♉ng the Black Power movement's emergence from civil rights struggles onwards, Olsson unspools 16mm film shot by Swedish TV reporters of activists including Stokely Carmichael and Angela Davis. The celebratory slant sidelines complexities but moving scenes of Davis interviewed in prison and '70s Harlem ravaged by 🌞drugs lend history the immediacy of on-the-spot reportage.