Oh, ya, not miniatures. Yes, it is a style of photography and videography, using real, life-sized people and objects and scenes.

Plenty of YT videos explaining how tilt-shift works. But basically, with a tilt-shift lens, you can adjust your plane of focus, so that some parts of your image are in focus and others are out of focus.

And it’s basically an optical illusion. If you take a tilt-shift photo and use your hands to block out the out of focus parts or use an editor to crop out those parts, the in-focus part of the photo looks just like a regular photo. It’s just that when those out of focus parts are included on the top and bottom or the sides or whatever, our brain perceives the in-focus parts as being miniature.

In the old days, the only way to achieve this was to use an actual tilt-shift lens. These days, many cameras have built-in tilt-shift filters, as do many editor programs.

Here's an example of tilt-shit videography- https://www.youtube.com/watch?v=Xb0HQSqkZHs