How The Credit Crunch and Credit Crisis Happened (Video)
This is by far the best and easiest to follow video describing how the credit crisis worked. Its in two parts with the first part showing how the mortgages were sold and repackaged to bankers and the second part showing the inevitable collapse.
Anyone who thinks this system is far too complicated needs to think again. The credit crunch can be accurately summed up in 11 minutes of YouTube. Check it out: