When You Run This File You Can See Your Live Camera

For tun this file you need to install some librarys :

Linux
Windows

Arch Linux :

OpenCV-Python: pip install opencv-python or sudo pacman -S python-opencv
NumPy (optional, but highly recommended for working with OpenCV): pip install numpy or sudo pacman -Spython-numpy

Windows :

OpenCV for Python: pip install opencv-python
NumPy (optional but recommended): pip install numpy