THEY FINALLY FIX !!!!!
After I update to NOTHING OS 2.5.5, the HDR video in YouTube is much brighter now !!! (Seems not bright enough but maybe hardware limit.). I don’t know which movie in Netflix can show it is using HDR mode so I can’t test.
[ Additional info ]
You can go to Developer options to enable “Disable HW overlays”, the screen will be brighter.
