That’s incredibly strange. Perhaps raised blacks is exclusive to the 12PM.
the raised blacks, along with True Tone being too aggressive are basically the only issues that can be fixed with software. For instance, when I was updating to 14.3 today there were NO raised blacks around the Apple logo unlike when you restart the phone so I know it’s possible and not a hardware defect. If you’re watching that video in horizontal full screen at max brightness in a room dark enough to notice I’m almost certain the display won’t be pure black.
I’d also appreciate if you could check for any colour tints (
https://forums.macrumors.com/thread...m-warm-check-here-first.2262691/post-29390701) while you’re checking the raised blacks as it’s a hardware related issue but it seems the majority of phones exhibit it due to lower tolerances, bad displays etc.