Yeh, it looks fugly out there. The banks are screwed - see Bears getting bailed out by the Fed and JPMC borrowing to keep 'em afloat. Interesting; the credit JPM "borrowed" is with no strings attached - if they lose their investment, they are not obligated to pay it back. Socialism in drag...
Anyway, nice find on the vid you posted, J&J. I've been following John Williams for some time now; a keenly smart guy.
http://www.shadowstats.com/
As for the margin calls, that's primarily hitting hedge funds at the moment. Just another of the reasons to keep away from them from an investment standpoint. It's a good time to have cash while we wait for things to come down and see how long this is really going to last...