I don't even like her music/video that much. It gives me a depression.﻿ So "dark" ....but again, they are all dark. The real symbols are subtle, the entire Hello song had Apocalyptic symbols, the sad horseman that you mentioned is actually Helios with his 4 horses, Helios is also Apollo or Apollyon the Angel with the Key to the Bottomless pit hence "Rolling in the deep", the flying plates, the water, the burning city and the Man dancing are just a few cues, there is a very similar dance in the video I pet goat II when the figure that represents the New Age does a Dance that wakes the image of the Beast and that video was made by a guy nicknamed Heliofant.﻿ Open your eyes...she has been initiated.