What is money?
Money as Debt--This links to a series of short films giving a good induction as to why money can be considered to be made of debt. Complete longer videos are here: Part I, Part 2 and Part 3.
Athough these videos give good insight into the history and workings of the financial system, they often use half-truths and jump to conclusions. Furthermore, they tend to get crazier (e.g., seeing conspiracy, the end of the world ) and more radical as they continue. Nevertheless interesting to watch.
The Biggest Scam In The History Of Mankind - Hidden Secrets of Money
Silver & Gold - Hidden Secrets Of Money Ep 1
Money Banking and the Federal Reserve