CBS was looking to fill some time after football on Sundays during the Christmas shopping season, or so the story goes. The anthology series, Famous Classic Tales, sponsored by Kenner Toys (now part of Hasbro) launched in 1970 with an adaptation of Charles Dickens' oft-adapted A Christmas Carol, produced by the Australian studio Air Programs International, which later moved into the Saturday morning arena, teaming first with Hanna-Barbera for 1971's Funky Phantom, then foraging out on its own with a series based on Jules Verne's Around The World In 80 Days, which was a 1-year flop for NBC.
Understandably, API never sold another show to NBC after that failure, and all subsequent programs would end up at CBS. H-B bought API somewhere in the midst of it all, but that's another story altogether.
Famous Classic Tales also gained air berths during the week, usually around Thanksgiving, as memory serves. H-B would take over producing the cartoons after purchasing API, as I do remember some of the later productions being under the H-B imprint.
There is also a YouTube channel bearing the Famous Classic Tales name, from which we get this trailer for the special, Tales of Washington Irving, which adapted Rip Van Winkle and The Legend of Sleepy Hollow.......
Episodes have been released on VHS, but not on DVD, insofar as I know.