YouTube Down on November 18, 2013 with "500 Internal Server Error"

YouTube was down from from Chicagoland showing the following error on November 18, 2013 at 4:30 p.m. CST:

500 Internal Server Error

Sorry, something went wrong.

A team of highly trained monkeys has been dispatched to deal with this situation.

If you see them, show them this information:
C8ZDH0P38upIuHL2ZpO-dstEXWtyF7TNJYpfDS-mBqAEuk ...