The video shows a swimmer in a pool, wearing a swim cap and goggles. The swimmer is seen performing a butterfly stroke, which is a swimming style where both arms move simultaneously underwater and both legs kick together. The swimmer's movements are smooth and coordinated, demonstrating a high level of skill and technique. The water in the pool is a clear blue, and the swimmer's swim cap and goggles are white, contrasting with the blue of the water. The swimmer's form is streamlined, and their movements are efficient and powerful. The video captures the swimmer's entire body as they move through the water, providing a clear view of the butterfly stroke technique.