AI video does two things a crew can't. It gets you the shots that never make it past a budget meeting — the flood, the fire, the creature, the aerial over a building you can't close — and it gets them without a location, a permit, or a shoot day.

On a big budget that's previz: see the spot before you commit the money.
On a small budget it's the finished spot.

Same pipeline either way. The character holds across every shot — that's the part that usually breaks.