Imagine you're watching a show or a movie on TV. The people on the show are talking, moving around, and doing things. In order to see them on your TV, a camera records their movements and actions.
Now imagine that instead of just one camera, there are many cameras placed all around the people. These cameras all record at the same time and from different angles, so you can see everything that's happening in a much more detailed way.
That's what happens when we make a video. We use lots of cameras to record the action from many different perspectives. Then we take all those recordings and put them together into a single "movie" or "clip" that people can watch on their computer or TV.
Everyday videos are even simpler. Instead of lots of cameras, we just use one camera to record small moments from our daily life. Maybe we record ourselves cooking breakfast, walking to school, or playing with our pets. Then we put all those small moments together into a longer video that shows what our life is like.
So just like when you watch a show or movie, when you watch an everyday video, you're seeing someone's life and the things they do in a more detailed way.