This started happening maybe a few days ago. I am sitting with a 600mbit/s internet connection and every time I start the game, my Youtube just starts lowering its resolutions as if it doesn’t have enough bandwidth and at a certain point the videos just stop playing. When i test the internet speed it all looks fine and it’s showing me max speeds, but Youtube just refuses to work. The moment I turn off the game, everything goes back to normal.
I dunno what you guys need with so much bandwidth, but It’s not very optimal