Probably never. If AI is good enough to cover all the skills needed to do what would currently make a blockbuster movie for less than $1000, the demand for movies will be small enough relative to supply that there will be no such thing as a “blockbuster movie”
On the other hand, I think the quality of movies and expectations will be a lot higher.
This is obviously true, but I don't see how it relates to the question being discussed. "Short videos" and "blockbuster movies" are clearly widely separated categories, despite both being audiovisual content of some kind.
No, that would require a radically different argument, in pretty much every way.
> if everyone can upload videos that anyone can watch, nobody will really be famous because fame will become very evenly distributed, right?
No, Youtube makes distribution cheap, but it doesn't substitute for most of the other things that differentiate between videos; most of the skills that provide variation between videos are still there, and not cheaply substituted via YouTube.
Edit: perhaps 12 angry men was good enough at the time.
When AI slop figures out that formula, we are truly cooked