Okay kiddo, when you look at a picture or a video on your computer, you might notice that sometimes the edges of the image look a little weird, like they're cut off or missing some parts. That's called "clipping."
Basically, when your computer tries to show you an image or a video, it needs to figure out where to draw all the bits and pieces so that they look like a complete picture. But sometimes, the picture is too big to fit on your screen, or it's just positioned in a way that some parts of it go outside the edges of your screen.
When that happens, your computer has to make some decisions about what to do with those extra bits. It can either try to squish the whole picture down so that it fits on your screen (which can make everything look really small and hard to see), or it can cut off the parts that don't fit (which is called "clipping").
Usually, your computer tries to be smart about clipping so that it doesn't cut off anything important, like a person's face in a photo or some important text in a document. But sometimes, things can still get a little wonky, and you might notice that something in the picture looks weird or like it's missing parts.
So that's clipping in a nutshell, buddy. It's basically just a way for your computer to deal with pictures and videos that are too big or positioned in a way that makes them tricky to display on your screen.