Here are a couple good videos that explain the financial crisis.
CNBC's House of Cards provides a very good introduction.
Frontline on PBS had two very good videos. Inside the Meltdown takes a look at beginning of the crisis starting with the collapse of Bear Stearns through collapses of AIG and Lehman Brothers. It is a little more technical. The Warning takes a closer look at the failure of Long Term Capital Management. Long Term Capital Management was the world's largest hedge fund that traded financial instruments similar to those that caused the financial crisis.
Finally, for those wondering more about Bernie Madoff here is a good video, The Madoff Affair.
These videos are for informational purposes. I get asked by a lot of students if there are any good websites or videos these are the best I have found.