Summer of Soul (...Or, When the Revolution Could Not Be Televised) is both an award-winner is and absolute joy, uncovering a treasure trove of pulse-racing, heart-stopping live music footage (originally captured by TV veteran Hal Tulchin) that has remained largely unseen for half a century. While Mike Wadleigh’s Woodstock and the Maysles’ Gimme Shelter have long been considered definitive documents of the highs and lows of 1969 pop culture, Summer of Soul makes both look like a footnote to the main event: a festival in the heart of Harlem that was somehow written out of the history books. Capturing Stevie Wonder at a turning point in his career, Mavis Staples duetting with Mahalia Jackson (“an unreal moment”, says Staples) and Nina Simone at the height of her performing powers, director Ahmir “Questlove” Thompson’s feature debut intertwines music and politics in one of the best concert movies of all time.