One of my favorite documentaries that I show to my students is "Onboard Air Force One." It is perfect for any class period at around 47 minutes long. This viewing guide easily takes students through the documentary. There is a link to the Youtube video that has the video. If for some reason the video is gone, it is easy to find on Youtube by searching the name.
This is great as an emergency sub plan, or as a regular lesson activity.
Comes with an answer key :)