Yes, you can use an external webcam on your laptop, even if it already has one built-in. Plug your new webcam into your laptop's USB port. This is very common, making your webcam more flexible and better. However, changing a laptop's built-in webcam is challenging and not a good idea for most people. That means buying a new webcam, turning on your computer, and switching them. When purchasing, buying a laptop with the best quality webcam is best.