Not mechanical, so much lower resolution... but you might have recently seen the History of Japan video being linked around... the guy who did that, Bill Wurtz also did this:

https://www.youtube.com/watch?v=YBI-nZTUgf8

There's an entire subreddit of this stuff as I guess it's really good practice for playing by ear:

https://www.reddit.com/r/zappafied

It includes this awesome Palin one:

https://www.youtube.com/watch?v=YBI-nZTUgf8

P.S. In case you missed it this is the History of Japan one again: https://www.youtube.com/watch?v=Mh5LY4Mz15o If you watch it again, you can hear him using that technique of harmonizing with his own spoken voice in the background music of that video.