DC has uploaded tons of DC Nation animated shorts to YouTube Including My Little Pony creator Lauren Faust's Super Best Friends Forever (previously). Not yet included: Robert Valley's super awesome 70s Wonder Woman.
The television program Adventures of Superman aired in first run from 1952 to 1958. When it ended, producer Whitney Ellsworth -- not that one -- sought to produce a follow-up series, The Adventures of Superpup. The show concerned an anthropomorphic super dog, Superpup, whose secret identity was mild-mannered reporter Bark Bent. (Bark was assisted by ace reporter Jimmy Olsen, who was now a mouse hand puppet living in Bark's desk drawer.) Naturally the producers cast little people in dog masks, as one does. [more inside]
Superman The Musical! A flop on Broadway about the Man Of Steel was made for TV once in 1975 and never again with Leslie Anne Warren, David Wilson, and Loretta Swit (but you can find it on amazon.)