“Summer of Soul (Or, When the Revolution Could Not Be Televised)” is billed as “A Questlove Jawn.” Beloved musician Ahmir Khalib Thompson makes his directorial debut with the documentary, slapping some Philadelphia slang on a story of a New York City event, bringing viewers back to 1969, when the Harlem Cultural Festival ruled Mt. Morris Park for six weekends during a special season. Thompson isn’t simply reviving interest in the concert series, he’s basically saving it from complete obscurity, with the production managing to locate footage of the Harlem Cultural Festival that’s been sitting in a corner somewhere for the last five decades. “Summer of Soul” is a lot of things, including an impressive restoration project, with the helmer creating a time machine for a moment when black culture was changing shape, giving 300,000 concertgoers a chance to see incredible musicians, leaders and preachers, and charismatic people put on a major show of love and respect for a population in need of hope and representation. Read the rest at Blu-ray.com