Camera in Windows

Can a camera be used from a PC? For a practical matter (screen size, fixed position,
etc.) I need to use the app on a PC or notebook, and it only allows me to upload file images, but I can not use the internal camera or a webcam to take pictures or scan codes. What am I doing wrong? How do I set it up?

Unfortunately you cannot use desktop/laptop camera for that purpose. You can refer to ** Capturing Images in a Web Browser** section of the below reference page.