This video covers a practice problem on the impact of unemployment, full employment, and overemployment (i.e. working harder) on the production possibilities frontier. The problem is taken from Principles of Microeconomics by Dirk Mateer and Lee Coppock, and is Ch. 2 problem #9.
You can find more practice problems via the Practice Problem of the Day category archive or by visiting the Econ Classroom page. You can also be notified of new practice problems by subscribing to the YouTube channel.