In the video, a young girl is seen swimming underwater in a pool. She is wearing a colorful swimsuit and has a mermaid tail attached to her feet. The girl is gracefully moving through the water, her arms and legs propelling her forward. The water is clear and blue, and the pool appears to be well-maintained. The girl seems to be enjoying herself, and her movements are smooth and effortless. The video captures the beauty and tranquility of underwater swimming, with the girl's mermaid tail adding a touch of whimsy and magic to the scene.