Have you ever seen a flipbook or a cartoon movie that looks like it's moving really fast but also looks a little bit choppy? That's kinda like what temporal posterization is.
So imagine that you're trying to make a flipbook of yourself doing a dance. If you took a picture of every single move, it would look really smooth and you'd be able to see all of the details. But if you took fewer pictures, like only one every couple of seconds, your flipbook would be choppier and you wouldn't see all of the little details in your movements.
Temporal posterization is kinda like that, but for movies or videos. When you watch a movie, it's made up of a bunch of pictures that are shown to you really quickly so that it looks like everything is moving smoothly. But sometimes, the people who made the movie want it to look a little bit different, so they might use temporal posterization.
Basically, they'll take the pictures that make up the movie and group them together in little chunks. So instead of showing you every single picture really quickly, they'll only show you one picture from each chunk. This makes the movie look a little bit choppier because you're not seeing every single detail, but it can also make the movie look really cool and artistic.
So that's what temporal posterization is. It's when the people who made a movie or video decide to group some of the pictures together instead of showing you every single one really quickly. It can make the movie look different and interesting, but it also makes it a little bit choppier.