The video shows a dense crowd gathered at night in what appears to be a public square. The area is illuminated by streetlights and buildings in the background, some of which appear historic. Many people are waving flags, predominantly the Catalan flag (red and yellow stripes with a blue canton and white star), and cheering. Purple smoke and red flares go off in the crowd. The atmosphere suggests a celebration or a rally. The crowd is mostly composed of younger people.