All laptops have a built-in video camera. Usually the window at the top of the screen is off. And it turns on only if the corresponding application is launched, for example, Skype. After the video session, it turns off again.

If you need to additionally connect the camera to a laptop, there are the following methods for this:

Key combination (Fn + V or Fn + Esc).
Through the device manager.
Using third-party programs.
In Windows 10, doing this is as easy as shelling pears. Open the "Start" menu and click on the word "Camera" in the list of programs. Then follow the prompts.
But it probably all depends on what kind of laptop you have and what operating system