Check whether your laptop supports video input
Look for HDMI-in, USB-C video input, or a capture card option
If your laptop has no video input, use remote desktop or screen-sharing software instead
Connect the external device to the laptop using the supported input method
If using a capture card, connect the source device to the capture card and the capture card to the laptop via USB
Open the capture software or display app on the laptop
Select the correct input source in the software
Adjust display settings, resolution, and audio if needed
Use full-screen mode for the best viewing experience
If using remote desktop, install the software on both devices and connect them on the same network or over the internet