[Warner306]

Were you watching them with MPC + madVR? I'm not familiar with the Intel drivers, so I don't know what you might be missing. I think you need to select D3D11 presentation and 10-bit output in madVR and check the option to send the HDR metadata to the display.

You only want to enable Windows HDR when playing HDR videos. Or SDR content is upconverted to HDR by Windows.