From the Introduction: "This packet is not designed to give you all the information that is needed for the AP United States Government Exam. Instead, the intent of this resource is to facilitate your own review of the material that is needed to do well on the AP test. I have created a skeletal structure within which that review will take place. The 75 minute review session on YouTube is a fast overview of most of the information that is needed to successfully fill out this packet."
You can find the video here: https://www.youtube.com/watch?v=TbJvSo5EoJ8