You'd have to use the same app that a capture card would use, and since you wouldn’t be using an external capture, it’s just cutting out the middleman. The only reason a laptop would have an HDMI-in port is if it had a capture card already built inside. It's possible to do it without a capture card via an HDMI-in port, but that's harder to find, and more expensive, than you might think. You cannot feed the Nintendo Switch's HDMI cable to your laptop because it has only an HDMI-out port.
The forum user, 0tter, asked if their Nintendo Switch can run on an Alienware 15 R3 with an HDMI-out 2.0 port, two USB 3.0 ports, a USB Type-C port and a Thunderbolt 3 port. Here is the Alienware Aurora R9 configuration sent to TechRadar for review: CPU: Intel Core i7- 9700K 3. Can I directly use a hdmi (switch dock) to usb 3.0 (laptop) cord to make it work or do you need a capture card to do that? Is there any way to do this without buying a capture card? I don't know my cords that well. I want to play my switch on my laptop monitor. You can only output to two monitors using the nvidia GPU via HDMI and mDP You. I have a nintendo switch and an alienware r3 15. Alienware Command Center may not work if you are using an outdated version.
