Twenty of the films in the Kino Lorber Pioneers of African-American Cinema collection are now available on Netflix. They include Paul Robeson’s debut in “Body and Soul,” a black and white silent film where he plays the dual roles of a preacher and his evil brother and “The Bronze Buckaroo,” with Herb Jeffries as a singing cowboy, as well as “Hot Biskits” (a man cheats at golf using magnets), “Birthright” (a Harvard-educated man goes home to start a school), and “Verdict not Guilty” (“Truth” serves as judge over a woman’s life).