In the video, a person is seen pouring a liquid from a pot into a bucket. The bucket is already filled with a white substance and is placed on top of another bucket. As the liquid is poured, it causes the white substance to react and create a foamy, bubbly mixture. The person continues to pour the liquid until the bucket is full. The foam continues to bubble and expand, filling the bucket to the brim. The video ends with the bucket overflowing with the white substance and foam.