The video shows a seal swimming underwater in a greenish ocean. The seal is seen swimming gracefully through the water, surrounded by seaweed and other marine life. The seal's movements are smooth and effortless, as it navigates through the water with ease. The ocean's color is a deep green, and the seal's body is a dark grey color. The seaweed is a lighter green and sways gently with the water's movement. There are no other animals or objects visible in the video.