In the video, a person is seen using a plastic bag to cover a crock pot. The person then proceeds to put a lid on top of the crock pot. The crock pot appears to be filled with some kind of food. The person's actions suggest that they are preparing to cook or reheat the food in the crock pot. The plastic bag may be used to keep the food fresh or to prevent any spills or splatters. The lid on top of the crock pot is likely used to help retain heat and cook the food evenly. Overall, the video seems to be a demonstration of how to use a crock pot with a plastic bag and lid.