While Youtube may be to blame, more of the blame should go to the uploader as I downloaded this vid and the bitrate was way too low for 4k. For 4k you want to use over 20000 kbps and this video comes at 8391 kbps which is not ideal for 4k at all. When I upload vids in 4k I always go above 20000 kbps to take advantage of the video quality. I've seen as high as 26000 kbps.Game looks fun but yikes what's the point of 4k with all that artifacting