The video shows a person using a microwave to heat a cup of coffee. The person places a paper towel on the bottom of the cup and then puts the cup in the microwave. After a few seconds, the person removes the cup from the microwave and then removes the paper towel. The coffee appears to be hot as steam can be seen coming from the cup. The person then takes a sip of the coffee, indicating that it is ready to drink. The video provides a clear demonstration of how to use a microwave to heat a cup of coffee.