Yes... but bitrate remains 4mbits at 1080p... play 1440p with 10mbits and video look very good! bitrate = quality... low bitrate=low quality more artifacts ... 20mbps (4k youtube transcoding) is too high for normal adsl fluid streaming .. but 1440p it's ok! (i have 7mbps bad italian adsl and see 2K video) 4K (20mbps) = 2.5MB/s 2K (10mbps) = 1,25MB/s (with slow adsl use smart buffer 20% and see video) YouTube create multiple versions from your stream