What is this animation style called?

The creator calls it “animated optical illusions”, but that doesn’t seem right to me. It’s not actually an illusion, really.

Example here:

(for those who don't like unexplained links ... starting with what looks like a jumbled mess or "magic eye" picture, you draw a grid of black bars across it, it turns into an animated picture using a kind of strobe effect. Crappy example from my kitchen table here - it's actually quite easy to figure out how to make them. https://www.youtube.com/watch?v=AsGz-dJlpIk)

They look like Moiré patterns to me.

That’s a Moiré?

Yes, this particular style is called Line Moire.

When the movie hits your eye…

That’s a Moiré.

Yes!

When I search for "Moire Animation on YouTube, brings up a bunch of them.

https://www.youtube.com/results?search_query=moire+animation

Thanks, Dope!

A Kinegram?

When strolling by the sea,
may something bite your on you knee.
That’s a moray.

There’s a 2007 children’s book titled Gallop that uses this method to animate animals. In this book they call it “Scanimation”; a search for scanimation has lots of DIY links.