BECOMING LED ZEPPELIN IMAX EXCLUSIVE: Q&A with filmmakers Bernard MacMahon and Allison McGourty. BECOMING LED ZEPPELIN is the first ever authorized documentary about the band. The film charts the early musical influences and careers of each bandmate before diving deep into their first two albums and subsequent tours. The film features “never-before-seen” footage, remastered sound and video, and audio interviews with John Bonham that have been kept private for decades. Full songs play in the film, making it feel just like a concert.