Why do 4K videos on 1080p monitor look better than 1080p videos on 1080p monitor? The monitor displays the same amount of pixels in both cases, doesn’t it?
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Filmmaker / film lecturer here: Really simple terms 99% of all digital video is compressed in way that saves space, so it has fake pixels that take information from other pixels to save data and make a smaller file (colour / orientation etc) it does this in each single frame, and over a series of frames.
HD video there’s already less pixels (about 2.5 times less than 4k) so this data saving method is more apparent with less pixels (more guess work) than 4k which has more pixels to do the data saving guesswork, which makes it a bit more accurate / better looking.
Thats the end of ELIF, if you want to know more look up “long GOP” (group of pictures), spatial / temporal compression and the most popular online video format, h264. That’ll explain in a bit more depth how it works.
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