Looks like fake 3D animation. Focus on the second part “filmed” from a smaller distance:

• Sand layer is visible on one side, not on the other.

• Trees are on both sides but not many in the whole. They should be on the top of it if the ground collapsed.

• Stone layer and sand layer are separated like a magic, no half-sand / half-stone layer in between.

• Low quality video likely meant to hide the fuckups of the 3D animator.

I would give it 30% of chance being real, 70% fake.