Brian Flemming has allowed theatrical screenings to be held by any person or group without the payment of royalties.
The documentary came about during Brian Flemming's research into his fictional thriller "The Beast".
The Superboy story that Robert Price refers to (where he goes into to the future to discover he is considered only a folktale in the future) appeared in Adventure Comics #279 . It does not refer to the Earth-23/Pocket Universe Superboy story of a similar theme.