It looks like the damage is where the video titles are rather than the hot components. I reason that the processors, power supply, RAM and other components that represent concentrated sources of heat would be physically spread out in the TV's cabinet rather than all huddled together in a relatively small area.On mine it looks like the heat of the boards behind the panel eventually cause the pixels to degrade.
It looks like your room lighting demands a brighter image than the typical OLED is able to produce without damaging itself.