[Warner306]

I have another question, which video decoder should I use for best HDR playback?
If I select CUVID the playback on a demo HDR video (sony camping demo) is extremely choppy
If I select DXVA (copy - back) it's starts a bit choppy but evens it out eventually
If I select DXVA Native it plays ok, but the colors look inverted or something and overblown (see image below)

And in none of the selected decoders I get the HDR popup my LG tv gives when HDR content is played.

DXVA copy-back is the way to go for bug free playback.

HDR passthrough isn't working at this point because there is no way for the GPU to pass this metadata to the display. Currently, only HDR to SDR is working correctly.

Hmmm, ok thanks for the info, is there ANY way to play HDR content on my PC?

Use madVR's HDR to SDR conversion.

If you manually enable HDR mode on your display, passthrough may work, but I've never tried it myself.

This all seems pointless if you want to watch HDR demos. I would think that would get old pretty quick.