Haha, the moron Neenyah literally buried himself, completely disgracing himself, because... Even in his own screenshots the difference is clearly visible. As in the case of Chrome, where he disgraced himself with his own screenshots, enlarged by me 4 times, like my own. There he quietly disappeared from the topic, but here I just won't let him.
The difference between 4k and fhd is not visible only on screens, bingo! 4k.
Moreover, on a 2.5k screen, not only is the cloudiness of the picture in 1080p resolution visible, but due to the fact that 2.5k at the pixel level is not compatible with either 4k or fhd screens, this moron has even higher cloudiness than these 1080p are displayed on my screen 1920x1200. Which, by the way, is obviously much better in terms of colorspace of the Neenyah screen, because my monitor have 94% AdobeRGB.
Thus, the moron Neenyah proved that he is still completely blind or just a stupid troll, just littering the topics. After all, others immediately saw this difference.
In general, the topic is closed, Neenyah has disgraced himself once again.
Let's summarize, proven by screenshots and test video from YouTube in dynamics:
Never watch 1080p on YouTube and especially on a 2.5k screen. Always choose 4k by default if it is available, thereby you will dramatically improve the video quality visually. And don't listen to any local morons.