The video shows a group of people forming a human tower, a tradition called "castells" in Catalonia. The base, or "pinya," consists of many people closely packed together, providing a stable foundation. At least four people wearing red shirts and white pants are climbing on top of the pinya to build the next layer of the tower. Many people in the pinya are wearing green shirts, white pants, and black sashes, while others wear red shirts and sashes. A young person wearing a red shirt and a helmet-like head covering is in the foreground. The event appears to be taking place outdoors on a sunny day with some trees and buildings visible in the background.