The dancing in “Chandelier” and “We Exist” is intimate. Unlike in big, dance-featuring videos from Chris Brown or Ariana Grande, dance is the only thing that’s happening, and the engine that moves the video’s narrative forward. “Chandelier” calls to mind the fluid minimalism of videos like Kate Bush’s “Running up That Hill, Robyn’s “Call Your Girlfriend,” or Kiesza’s “Hideaway.” In those, and Heffington’s work, dance isn’t just a decorative flourish, but at the center, communicating a message. but great dancing, period.