I watched the music video and.......I'm not sure I get all the symbolism. The general theme seems to be destruction; dishes being thrown at a wall creating a huge pile of broken pieces, a paper city burned down by the end of the video, some pyrotechnics, and the lyrics speak of a love gone sour. But then there's a dancer robed in black dancing in a room with black walls with a floor covered in powder, a floor full of partially filled glasses, Adele sitting in a room with most of the walls and the (sparce) furniture covered in plastic just singing to no one. I'll have to chalk it up to pure visual fluff.
As I said, I already enjoy the song, and I think it stands up to repeat listens. The music video however, might only be worth watching once.