In the video, a person is seen adding chicken broth to a slow cooker that already contains chicken and mushrooms. The slow cooker is black in color, and the chicken and mushrooms are white in color. The person pours the chicken broth from a white can into the slow cooker, ensuring that the chicken and mushrooms are well-coated with the broth. The video focuses on the action of pouring the broth and does not show any other part of the cooking process.