I just rented the movie 'It' on Google Movies. I at first tried to play it on my Shield TV via the Google Movies app and it played in 4K but no HDR. Then I tried the Youtube app on my Shield and it played in 1080p only. I then tried the Youtube app on my TV and hurrah, the HDR logo popped up on the top right of my screen. The excitement wore off however as I quickly noticed it was stuck on 480p! I could not select anything above 480p...

I then as a last resort tried to use the built in Chromecast of the Shield. Again, 4k but no HDR.

I am quite annoyed by this now, knowing the movie is in HDR but all my playback options do not give me the best quality. I know my Shield TV is properly set up for HDR because it runs HDR and streamed Blu-Rays via Plex with HDR (the HDR logo pops up).

Any ideas on how to either get the Shield giving me the joys of HDR, or stop the Youtube app on my TV from being silly and serve me 4K HDR instead of damn 480p HDR?

My TV is a LG OLED55E7N.

Thanks...