If it were a monitor issue, I wouldn't have been able to capture the brightness discrepancy in a screenshot. Turning on the HDR feature in Windows makes EVERYTHING darker and washed out, the video application should be able to play HDR encoded files just fine, but as you can see from the screenshot, it simply doesn't. I wonder if anyone else has downloaded 2160p encoded video files and had them play bright and crisp in HDR on Windows, ever.