Final Fantasy VII Remake Cutscenes Rendered in Real-Time?

More in uploader's channel: https://www.youtube.com/channel/UCf7y6pZ-rnrFtHpX0vqB5HQ

He said he only hacked the save files.

There were reports that at least a few cutscenes were pre-rendered and cannot be changed.

How far are we from "procedural scene generation"?