the alpha build of kodi 19 supports playback of hdr files now and the neat thing is it toggles hdr on for you automatically maybe be something for you to try as it turns hdr off as soon as you exit the film also been using it for months now and its perfectLife ain't easy for a PC user. I normally use the TV as a monitor, running 1080p/120 in PC mode. If I want to watch a 4k HDR movie, I need to change resolution and turn on HDR in windows, switch the input from PC mode, switch to movie mode. Reverse all of that after the movie. None of it can be scripted apparently, and no shortcuts.