OK, I'm not a flying expert, however I know enough about aerodynamics and the outline capabilities of a B737-sized aircraft.
Given that this aircraft was initiating a GA went everything went really pear-shaped (following the unstable approach that is), then how the dickens does it end with such a high (apparently from the brief video) almost 90deg nose dive into the ground?? I mean, I wouldn't expect that it could be achieved by anything other than an astonishingly savage pull up, to near vertical climb to stall, wing over and dive....especially to remain anywhere near the vicinity of the airport security cameras?
edit: .....or stall, tumble and dive?