Before J. Balvin became a record-breaking chart-topper, he was José Álvaro Osorio Balvín, just another boy in Medellín, Colombia, with big dreams and an even bigger drive to make them come true. In Matthew Heineman’s documentary, the pop star alternates between his carefree onstage persona and who he is when the cameras and fans aren’t around. He’s especially open about his struggles with mental illness in an effort to destigmatize the subject for his fans and listeners. Centered on the artist’s biggest concert, “The Boy from Medellín” gives fans an all-access pass to candid moments and confessional interviews during one of the most emotionally charged moments of his career.