One of my favorite sites that I use to review is Heimler's History. He has his own YouTube channel where you can find entertaining review videos for every unit that we will be studying this year. You can follow the links below to be taken to our page for that unit that contain all of his videos for that unit of study.
Here are some links to other YouTube channels and websites that were created by other AP U.S. History Teachers that contain some very good review videos.
Videos about different topics in U.S. History
Here are some links to some other review sites that you may find helpful.
The National College Board has their own YouTube channel where you can find good videos for review. You can go directly to their page by clicking the following link below: