Question Youtube 4K playback issue with my RX470

CS_044

Commendable
Aug 25, 2020
104
12
1,615
This RX470 is driving me nuts, another issue has arisen after fixing the others, and I wonder if anyone here can help?

So, the problem, is with 4K video playback on youtube, whenever wanting to view a 4K video in full screen, this appears: (what is seen in the image below) - And this only happens when in full screen at 4K, full screen or out of full screen at all other resolutions is fine.
View: https://imgur.com/wAaoTiK


To add, I have already reinstalled the GPU drivers multiple times, and this is on a fresh install of windows.