Have to temper expectations with fact that a generated video of a thing is also a recording of a simulation of the thing. For long video, you'd want everything

Have to temper expectations with fact that a generated video of a thing is also a recording of a simulation of the thing. For long video, you'd want everything from temporal consistency and emotional affect maintenance to conservation of energy, angular momentum and respecting this or that dynamics. A bunch of fields would be simultaneously impacted. From computational physics to 3D animation (if you have a 3D renderer and video generator, you can compose both). While it's not completely unfounded to extrapolate that progress will be as fast as with everything prior, consequences would be a lot more profound while complexities are much compounded. I down weight accordingly even though I'd actually prefer to be wrong.