I didn’t recognize it - title please?
The title is “This is Spinal Tap”, more well-known as “Spinal Tap”. It is a mock documentary (mockumentary) of a down-at-its-heels rock group trying to stage a comeback, and is satire at its finest! The Stonehenge reference is because one of the group’s most popular songs in the past featured a replica of Stonehenge. In the movie, they wanted a Stonehenge replica, but someone got the dimensions wrong, and it ended up being only 18 inches high, and they were totally embarassed. Hilarious!