@cinemacapman mm... I doubt very much that anything is being STREAMED in 4K, because that would require a mountain of bandwidth for both the sender and the receiver.
Forget about resolution.. I only keep less than 1% of what is uploaded here. Either the performers suck and/or the camera work sucks and/or they add a horrible sound track and/or the performers lack enthusiasm.
BUT.. I'm glad about that, because otherwise I could never keep up with all the scenes I want to keep! I pity straight guys, because there is such a vast OCEAN of straight porn, it is not possible to come close to keeping up with it all.