The video shows a large whale swimming underwater. The whale is dark gray in color and has a long, curved body. It moves slowly through the water, with its tail fin visible in some shots. The water is a greenish-blue color, and there are no other visible creatures or objects in the video. The whale appears to be alone, and there is no interaction with any other object or creature. The video captures the whale's smooth, graceful movements as it navigates through the water.