Movies are absolutely full of background replacement and other things that require keying.
So its for mainstream film studios? Thats tired status quo stuff.
Then cg is also tired status quo stuff. I'm working on brain generated imagery where a carefully engineered prompt causes the user to picture a scene directly in their mind.
You seem unsure what to dislike more: "youtube slop peddlers" or "tired status quo stuff".
Both and now they are one in the same.