The PS4 Pro footage looks mucky. 4K Youtube is capable of better.
I found the same footage on the official Tomb Raider Youtube, and made a slideshow to A/B between some of the biggest quality differences between the two encodes.
https://youtu.be/A11sj0EiEzs
Again, this is a comparison between two Youtube uploads. It's only 1080p, so don't judge resolution. But because they're stills, they look virtually identical to their sources in terms of compression artifacting.
You do realize every time something is run through youtube it gets compressed?