Is it the old garbage video where they didn’t even approach max RAM usage in either OS?
checks crossposts
It is the old garbage video. Their test system has plenty of RAM. Neither OS even approached saturation. Absolutely nothing meaningful can be gleaned from this video.



















They have lots of jpg artefacts because they are heavily compressed jpgs. Nothing you can do about it except finding the uncompressed original, which would have a much larger filesize.
As far as I recall all pixel images in PDFs are jpgs. So they will all have varying degrees of artefacts.