Questlove‘s new documentary has won the Grand Jury prize at Sundance Film Festival.Summer of Soul (…Or, When the Revolution Could Not Be Televised) documents the 1969 Harlem Cultural Festival.“It has always been a dream of mine to direct films and telling this story has truly been an amazing experience,” Questlove wrote in a statement following his win.“I am overwhelmed and honored by the reception the film is receiving and want to give special thanks to Sundance, and my production partners: