I've been watching some videos on my 55XE9005 using the SmartYoutubeTV app as discussed in the other large thread.

This is my first HDR experience but I'm sure something isn't right. When I load up the HDR stream and the TV changes to HDR mode (as indicated in the picture settings) it appears like the brightness drops and everything looks LESS contrasty and washed out. When I switch the stream over to the SDR 4k option and the TV drops out of HDR, the overall brightness is noticeably higher and everything appears more contrasty.

I have brightness set to max for both modes and am using the Cinema Home picture mode.

This behaviour is basically the opposite of what I expected from the HDR stream, I thought the whole point was it should be brighter, higher contrast and more colour pop than the SDR equivalent but that doesn't seem to be the case