AV.io video grabbers are the simplest way to capture video. Automatic configuration with no software or drivers to install. With the AV.io 4K you can capture 4K video in perfect fidelity, or use hardware scaling to meet your application needs at any resolution. See the product here.
This how-to video describes the process of using AV.io 4K to capture 4K video on Windows using VLC.
Click here to watch this video on YouTube.