While logged in, you can tell which courses you have purchased.
Find the course you want to review. Next, you can select the class within the course that you want to revisit by clicking on the orange bar, “See classes.” Click on the green play button to the right of the class you want to enter. Lastly, click on the “menu” to navigate to the exact video lesson or exercise you wish to view.
That should do it. Let us know if you need further assistance.