The video shows a scuba diver swimming through a narrow passage in a cave. The cave walls are rocky and uneven, with various shades of brown and gray. The diver is wearing a black wetsuit, a mask, and a breathing apparatus. As the diver moves forward, the light at the end of the passage becomes brighter, indicating that the cave opens up into a larger area. The water is clear, and the diver's movements are slow and deliberate as they navigate the tight space.