Guncam footage - why aren't those gunners doing anything?

[swiss]

I can't spot any major damage, the plane isn't burning or leaking anything, all 4 engines are still running - why would they abandon the plane?

I would guess most of them are dead/injured.
Also the plane banks several times and goes back to level flight; auto- or real pilot?

0:08: Whatever leaves the planes there is rotating damn fast. It's either a part of the plane that fell off or something they threw out.