Stanley Kubrick A Life in Pictures | Filmmakers Behind the Scenes | Warner Bros. Entertainment - close to two and a half hours.
In this, and another documentary, Douglas Trumbull refers to an experimental filmmaker that developed slit-scan photography. The filmmaker was John Whitney Sr. I'm a fan John Whitney and his brother James, as well as John Whitney Jr. John and James made experimental analog computer animated films. The films were abstract, and the hardware were adapted by John, and perhaps James, from WWII army surplus.