Money, Banking and the Federal Reserve, produced by the Ludwig von Mises Institute.

This is the premier introduction to understanding what money is, how governments always seek to control the economy through currency manipulation, and their partner in crime, the central bank – in the US, the unlawful Federal Reserve System.

There are several other videos out there, two that I can think of off-hand are produced by socialists and the monetarists. Both provide generally decent histories of central banking and currency manipulation, but their solutions are more of the same: More government control. Only the Mises video represents the true free market solution to money and banking. Enjoy!