Not because Disney reused drawings, because in the olden days (before computers and stuff) making cartoons was HARD. This just seems like an economical way to keep producing movies for kids like me to watch.
What I find interesting is that someone watched enough Disney movies to realize this. And then put together a video.
If they have this much spare time, can’t they come do laundry at my house?
(Seriously, Disney video-putter-togetherer. Call me.)