those videos are window dressing.
scapegoating. the folks who made the most money had the most incentive to make bad loans: they collect the fees. the mortgage brokers, realtors, banks, lenders.
the guys on wall street who raked in millions and billions had the most incentive.
they even successfully lobbied columbus and the feds to prevent Cleveland from cracking down on irresponsible lending.
http://www.callahansclevelanddiary.com/The banks were handing out ARM loans to everyone. human nature being what it is, many folks sign up for more house than they can afford. folks across all income levels sign up for more home than they can afford. when shit is advertised everywhere, a lot of people will buy a lot of shit. e-trade, scottrade, casinoes, convention centers, forbes, mcdonalds.
The bond rating agencies committed fraud in rating the "mortgage backed securities". they aren't being pressed on it--it would hurt morale. the post industrial economy relies on sprawl. there are vast tracts of empty mcmansions adorning the sunbelt states that will cause us a lot more problems: they're tied up with fresh construction costs. crappy old houses in cleveland were built about a hundred years ago and bought and paid off multiple times. political rhetoric aimed at "helping" "minorities" and the working poor and recent college graduates was really code to address the fact that highly subsidized suburban flight empties out the cities and old suburbs fast as lightning: the biggest work around is also some token effort.