Thought this was quite interesting.
Note, since this video was uploaded, nVidia have enabled this feature officially in their beta application, aptly called: 'nVidia App' - which looks to be a replacement to the current Geforce Experience app.Nvidia recently added driver-level RTX HDR support for video, adding impressive HDR to any SDR video - but modders have discovered that it works for games too - and the results are impressive. There's support for more games than Microsoft's AutoHDR, the HDR delivery is much improved, and it even works on emulators too. Alex Battaglia has the full lowdown.
https://www.nexusmods.com/site/mods/781
https://www.nvidia.com/en-us/software/nvidia-app/