"The Black Power Mixtape 1967-1975" unreels long-unseen footage of America's black power movement, featuring scenes of Harlem, Brooklyn and Oakland; and interviews with such notables as Stokely Carmichael, Angela Davis and Eldridge Cleaver. The documentary is accented with contemporary audio remarks from black artists, activists and scholars, including singer Eyrkah Badu, Roots drummer ?uestlove, filmmaker Melvin Van Peebles, hip-hop performer Talib Kweli and poet Sonia Sanchez.