Liked Greta's goofy moves in indie trailblazer Frances Ha? Then, you'll love her dance-like-no-one's-watching sequence in Arcade Fire's music video for Afterlife, which just happened to be filmed live at this weekend's YouTube Awards, no less directed by Spike Jonze. It's all jazz hands, hair swooshing and fist pumps – guaranteed to put you in a good mood, even after a heavy-on-the-feet Cup Day.