These overviews of WNET-Ch. 13 in New York aren’t televised nationwide, but should be – because these well-produced local TV history lessons are a true treat to watch. It would be enough, in this compendium of local and national programming produced by WNET, to start and stop with Bill Moyers’ Joseph Campbell and the Power of Myth, one of the best talking-heads TV series ever made. But the other stuff sampled and saluted here includes David Attenborough’s Life on Earth, the movie Koyaanisqatsi, and the late, great American Playhouse.