In the video, a person is using a potato masher to mash a banana in a bowl. The person is pressing down on the potato masher with their hand, and the banana is being mashed into smaller pieces. The bowl is white, and the banana is yellow. The person's hand is visible, and they are wearing a black shirt. The potato masher is silver and has a handle. The person is mashing the banana with a back-and-forth motion.