Late-night musical performance features dancing children in Valencia

A group of people stands and watches a stage, where a band plays. In front of the stage, a few people lie down while several young girls in white dresses dance around them. Other children sit or stand on the steps leading up to the stage. Many of the people watching are holding up their phones, apparently recording the performance. The room is lit with blue, green, and white spotlights, and the stage is illuminated with yellow lights.