The video shows a group of people swimming underwater in a body of water. The water is clear and blue, and the swimmers are wearing flippers and goggles. They are swimming in a line, with one person leading and the others following behind. The swimmers are moving slowly and gracefully through the water, with their arms and legs moving in a coordinated manner. The underwater scenery is beautiful, with coral and fish visible in the background. The light from the sun filters through the water, creating a serene and peaceful atmosphere.