Wow. I was skeptical this was the reason and almost argued because it doesnt make sense that it would affect things going through a proxy app. How would they know when Im watching from my computer? However, I did what you said and it worked! no problem watching 4k videos and it doesn't use any tethering data. Just to clarify I was watching youtube on my computer using tethering and could watch 4k no problem, other than eating up all my data. Using a proxy it didnt eat up my data but the best i could watch was 480p and sometimes 720p. Turning off the video streaming throttling, which was not easy to find, worked and then also did speed up my download speed as I realized I was reading the speeds wrong, mixing up Mbps (Mega BITS per second) and MBps (Mega BYTES per second). Thank you so much for the help! and a reminder to everyone to always try what the troubleshooter tells you to do, even if it doesn't make sense because they know what they are talking about more than you do!