The video shows a woman dressed as a mermaid swimming in a large aquarium tank. She is wearing a blue and green mermaid costume with a shiny tail and a flowing top. The woman is seen swimming gracefully through the water, moving her arms and legs in a way that mimics the movements of a real mermaid. She is also seen interacting with the audience, waving and making gestures with her hands. The aquarium is well-lit, with bubbles rising to the surface of the water, creating a magical underwater scene. The video captures the woman's performance from different angles, showcasing her swimming skills and the beauty of her costume.