There are very few things I believe every citizen of the United States should read, hear, or see. This is one of them.
The Republic stands on the strength of an informed citizenry capable of exercising oversight over their government. The government should always be an instrument in the hands of the people. As the police are the most common point of contact most people have with their government, every citizen should know how to negotiate police encounters.
10 Rules For Dealing With Police
Start it at 5:30 to skip past the CATO Institute's introduction.
EDIT: For those interested, the actual video is only 40 minutes long. The rest consists of a Q&A session at CATO. It doesn't need to be watched by every citizen in the Union.