Look more like CGI to me.
ALL airplane surfaces generate lift. Even crashing planes. If you remove the tail surfaces and the wings, it still wouldn’t nosedive vertically. They are designed to generate lift even with the fuselage.
And if this “aircraft”has any parts of wings on the dive, it would have some horizontal component besides the vertical.
Losing the tail could be either cause or effect, but without the tail the center of gravity is way forward of the wings, and the horizontal stablizers in the tail are missing. Could easily lead to a nosedive.
Or the tail could have come off in the attempted recovery of level flight, from too much speed and stress.
Hmmm