The video shows a man in a black wetsuit swimming underwater in a large aquarium. He is wearing a snorkel and goggles and is surrounded by various fish and coral. The man is seen swimming gracefully through the water, occasionally reaching out to touch the fish. The aquarium is well-lit, and the water is clear, allowing for a good view of the marine life. The man appears to be enjoying his time underwater, and the fish seem to be undisturbed by his presence.