Animated World of DC Comics: Lex Luthor Strikes Back (World's Greatest Super Friends, 1979)
Lex Luthor (Stan Jones) uses a unique reverse camera to enable another escape from prison, part of a convoluted revenge plot against the Super Friends. Because only 8 episodes were made during the World's Greatest season, this would be Luthor's only appearance, as the remainder of the episodes were based on classic literature. Lex would not return until "Revenge of Doom" a couple of years later.
Here's "Lex Luthor Strikes Back":
A portion of this episode was later shown on, of all things, an NBC interview conducted by Jack Perkins with Casey Kasem (Robin) a year or so later.