In the video, a woman is seen swimming underwater in a mermaid costume. She is wearing a blue and purple tail and a black top. She is swimming gracefully, moving her arms and legs in a way that mimics the movements of a mermaid. The water around her is dark, but there are some fish swimming nearby. The woman seems to be enjoying herself as she swims, occasionally looking at the camera. The video captures the beauty and grace of the mermaid costume and the underwater world.