There’s another little issue, also happens on your video samples, there are some kind of artifacts that appear in the middle of the video, kind of like broken picture. I took a screenshot to show you: absoluteps4.com/picture_artifact.jpg
This happens on all videos mine and yours too and is very noticeable mainly if you go full screen.
those artifacts show a lot on chrome, but in safari and firefox that doesn’t happen.
The picture is pixellised in low 500_k settings. In Firefox, even in low profile full screen i can see quite well, it has the edges smooth, chrome doesn’t, it’s too pixellised.