(via The Hauntological Society)
At first, this seemed too good to be true - like it actually might be an incredibly well-made contemporary artifact.
But it seems to hail from American 1970s public television.
See also
https://archive.org/details/devilsmonstersanddragons
https://archive.org/details/SpacestoLiveIn
https://www.youtube.com/playlist?list=PLDMe17La2Vj4xTk7Uja1hl8pZbuhrjJyk
