The trailer for the 1969 Don Knotts vehicle The Love God? (The question mark is part of the title.)
Don plays Abner Audubon Peacock, who — if you only looked at the trailer — appears to be a rather plain man who is for some reason found astoundingly sexy by women. But the actual plot involves Abner becoming the king of a soft-core porn empire, a Hugh Hefner clone. Wonder why that couldn’t get into the trailer?
The band in the trailer is called Orange Colored Sky and they take outsized pride in their appearance.
I may have to go track the movie down, since I loved Don Knotts movies when I was a kid. For some reason they were always on TV on Saturday afternoons, after the cartoons. How to Frame a Figg! The Shakiest Gun in the West! The Reluctant Astronaut! The Ghost and Mr. Chicken! And my absolute childhood favorite, The Incredible Mr. Limpet, in which Don becomes a fish and helps hunt German submarines. Man, I loved that Mr. Limpet around age 7.