Watch Cobain: Montage of Heck for Free: How to Stream the Movie Online at 123Movies. . Hailed as one of the most innovative and intimate documentaries of all time, experience Kurt Cobain like never before in the only ever fully authorized portrait of the famed music icon. Academy Award nominated filmmaker Brett Morgen expertly blends Cobain's personal archive of art, music, never seen before movies, animation and revelatory interviews from his family and closest friends.