Copyright is not “use it or lose it”, but as it is, it is unworkable for digital media. Computer hardware doesn’t last a century and with no other measures being taken to preserve that content, it’s effectively doomed by the law. It also doesn’t reflect a world where average people make edits of copyrighted content as a means of expression without seeing any problem with that.
It’s so funny when people get caught up with things like that.
It’s also funny but a little sad when people’s expectations of how colorful ancient times ought to be, or rather shouldn’t be, create standards of “realism” that are completely opposite to how history really was.