The video shows a man wearing a headlamp and swimming through a dark cave. The cave is filled with water, and the man is moving forward, using his headlamp to illuminate the way. The water is dark and murky, and the cave walls are visible in the background. The man appears to be alone, and there is no one else visible in the video. The light from the headlamp creates a bright spot in the otherwise dark cave, and the man's movements are steady and deliberate as he navigates through the water.