In the video, a person is seen holding a glass jar filled with water. The person then pours the water onto a pile of baking soda that is sitting on the ground. As the water hits the baking soda, it causes a chemical reaction that results in a foamy, bubbly substance. The person continues to pour the water onto the baking soda, causing the reaction to intensify and spread across the ground. The foam grows larger and larger, eventually covering a significant area of the ground. The person continues to pour the water and watch the reaction until the foam subsides.