Video is like a moving picture. You know how you draw a picture and it never moves? Well, video is like a picture that moves! When you watch a video, you can see people and things moving around, just like in real life.
You can make a video with a special camera that takes lots and lots of pictures really quickly. Then, when you play all the pictures in order, it looks like things are moving. And when you add some sound to it, like music or people talking, it's even more fun to watch!
You can watch videos on a TV or a computer or even on a small device like a phone or tablet. There are all kinds of videos, like funny videos of animals, exciting videos of real-life adventures, and even educational videos that teach you new things! Videos are great for entertainment and for learning, and they help you see things that you might not be able to see in real life.