This video shows two dogs, one large and one small, running on a grassy field. The large dog is white and has a fluffy coat, while the small dog is brown and white. They are both running towards the camera, with the large dog in the foreground and the small dog slightly behind. The large dog is smiling and appears to be happy, while the small dog is running with its tongue out. The background is a green grassy field with trees in the distance.