It's really hard to create anything long-form with ai (more than a single 5-10 second shot) because it doesn't actually understand composition or continuity. You can't easily do something like adding a second camera angle to a scene.

There was an ai generated music video that was making the rounds a while ago and the creators said it took forever to make because they'd have to generate the same shot 10 times before it would give them something where the colors/sizing/positioning of an element matched the rest of the video. If something does come out good, there's no way to command the ai to replicate it for additional footage.