My SAMSUNG TV (UE55KS9000) was meant to support HLG but SAMSUNG could not find a few to integrate this into the TV's system. I was able to watch the 2018 world cup matches and 2019 Wimbledon Tennis via the Virgin Media V6 TV box which does support HLG. Mostly the picture was great, occasionally the sound died and I had to quit the app and restart the process which was a bit of a pain.