run a traceroute to the CDN that's serving your 4K YouTube session - if you know how to do that then try the same over a VPN. I would bet you don't have any issues running the same traceroute or watching the video while running a VPN. I mentioned thi...
I've walked through troubleshooting steps with the CSRs on the phone. But to anyone that has a minimal amount of networking knowledge its obvious to see there's some sort of an issue within Roger's network stack. You can reproduce this issue yourself...