The video shows a medium-sized dog swimming in a harbor. The dog appears to be a Belgian Malinois. It's swimming in a circle, creating ripples in the water. A yellow tennis ball floats nearby. Concrete quays are visible on either side of the water. The quay on the far side is made of stone blocks and has a ladder going down to the water. Several people are walking and cycling in the background. The water is slightly green-tinged, and the day appears to be sunny.