Earlier quoted context omitted.
From what I know it is indeed perjury to file a DMCA claim on content for which you don't own the copyright (e.g. after it has expired). But rather than intentional bad faith it's highly likely these sorts of actions are fully automated by both YouTube and Disney. Probably YouTube has not yet removed Steamboat Willie-related content from its Content ID database and Disney has not yet disabled its own auto-strike syst…
If your computer program perjures itself who is liable? I mean, realistically no one because Di$ney but maybe they should get enough of a wrist slap to update their algorithm to prevent this sort of thing in the future.
The company that is running the offending program should be liable.
But who knows, I'm no lawyer.