The subject is the popularity of early-morning coffee raves in York. The scene is of people dancing and enjoying themselves.
Part way through the story the scene changes for a few seconds to that of a personable lady drummer.
The only odd things are that the original scenes appear to feature what sounds like a disco set-up although this wasn’t shown, but in the scene with the drummer, the lighting, background, and the way the ravers are dressed are completely different.
It’s almost as if the drummer scene has been inserted into the original footage. But what could the reason be?