YouTube has this excellent video The Crisis of Credit Visualized.
The Short and Simple Story of the Credit Crisis — The Full Version
By Jonathan Jarvis.
The goal of giving form to a complex situation like the credit crisis is to quickly supply the essence of the situation to those unfamiliar and uninitiated.
This is the original, full version.
There is still a lot of misinformation being spread about how the 2008/2009 crash happened and who is to blame. This 11 minute video makes it crystal clear how and why it happened. If you insist on blaming people like Barney Frank, at least get the right reason – lack of regulation. He did not promote the bad loans, he failed to stop them.