The video shows a swimmer in a pool, wearing a red swim cap and goggles, swimming in a lane marked by red and blue lane dividers. The swimmer is performing the freestyle stroke, moving their arms in a circular motion and kicking their legs. The water is clear and blue, and the swimmer's movements cause ripples and splashes. The swimmer's body is partially submerged, and their head is turned to the side as they breathe. The video captures the swimmer's technique and form as they swim.