Hanna-Barbera Connections

What I meant was I suspect this film was made by Hanna-Barbera Productions. Go down the credits list - nearly everyone involved with the film has H-B credits including director-writer Tony Benedict who wrote for THE FLINTSTONES and THE JETSONS. It's way too many to be a coincidence - H-B was notorious about being jealous if anyone else used their stock talent (they fired Bea Benaderet from FLINTSTONES because she was late to one taping due to her concurrent work on PETTICOAT JUNCTION!) so I doubt very much they would have been pleased for someone to have made a "faux" Hanna-Barbera film with much of their salaried talent. I suspect this film was originally made as a television special but H-B could not sell it to one of the major networks or obtain a major studio to release it theatrically so they sold the rights to it and took their name off the product. It was released by a very minor film company and pretty much sank like a stone in original theatrical release in 1970. Most people never even heard of it until it began being rerun on television as a syndicated Christmas special in the late 1970's or early 1980's.

The few who don't have H-B ties appear to be mostly involved with the apparently tacked on live-action sequences which may have been added in part because the "film" was rather short to be a feature-length theatrical film.