The video shows a large whale swimming in the ocean. The whale suddenly breaches the surface of the water, revealing its massive size and strength. As it breaches, a seal is seen on top of the whale, clinging onto its back. The seal appears to be using the whale as a means of transportation, riding along as the whale swims through the water. The ocean is calm, and the sky is clear, with no other visible creatures or objects in the vicinity. The video captures the unique interaction between the two marine animals, showcasing the beauty and power of nature.