This week brings the intersection of two documentaries rooted in great footage from different strands of Black history.

At the height of the Harlem Renaissance in the 1920s, the city bustled with activity. People recited Langston Hughes’ “Weary Blues” poem on street corners. Duke Ellington delivered electrifying performances at the Cotton Club. A'Lelia Walker, daughter of millionaire Madam C. J. Walker, drew an enviable guest list to…