IVMS, or Intelligent Video Management System, is like a special library that keeps track of books in a bookstore. In a bookstore, there are many books on shelves and it's hard to know where a particular book is. Similarly, in an IVMS, there are many cameras that take videos of different things, and it's hard to know where a particular video is.
Just like how the librarian in the bookstore helps you find the book you need, the IVMS helps you find the video you need. It does this by organizing and tagging the videos in different ways so that you can easily find them. Some examples of ways that videos can be organized are by location, time, or type of activity.
Now imagine that every book in the bookstore has a chip inside it that tells the librarian everything about the book: who wrote it, what it's about, how many pages it has, and so on. And imagine that the librarian has a magic computer that can scan these chips and instantly find any book in the store.
In the same way, every camera in an IVMS has a chip that tells the system information about the video it takes, such as where it was taken, what time it was taken, and what's happening in the video. The IVMS has a magic computer that can scan these chips and instantly find any video in the system.
So that's what an IVMS is: a special library for videos that helps you find the exact video you need, just like how a librarian helps you find the exact book you need in a bookstore!