That old demon devil movie is "Curse of the Demon" or "Night of the Demon"

Surely this was an influence on some of the D&D demons in the old books. Good stuff!

It was an Easter Egg in that Ghostrider movie with Nick Cage... near beginning of movie on the TV on the bus(?) after Nick Cage survived a jump as an adult which broke the plastic front of his helmet.

Thanks to http://1001plus.blogspot.com/2016/03/off-script-night-of-demon.html for the first picture:

More here: https://www.youtube.com/watch?v=3FyD9wcKjmY