> eg. "scene 32, same 2 characters from the previous scene, now dressed in the garb of Egyption middle kingdom high priests, though with cat faces, dancing on the back of an elephant that is running fast with blurred feet on the surface of a river with licks of water that burst from the water in time with the music that I gave you before, length of song for this clip 2:21 to 2:31"

No need to even be so detailed: "Make this an ancient egypt theme" would probably work.