Youtube only using uplink?

[joshnoodle]

So, I've been watching Youtube videos at 1440p+ lately, and I've been having a problem. I can't get it to playback without buffering. I have a 60Mbps connection that I confirm I can use all of it all of the time. So why is Youtube buffering? I checked my router, which is an ASUS RT-AC68U, since it has an app monitor to see what a specific app's usage on the connection is. It's showing that Youtube is only using 4Mbps, AND that its using it on the uplink, while almost none (0.5Mbps) on the downlink. That's the max speed of my upload too. It also shows 3145Kbps in 'Stats for nerds' on the video itself. How can that be when you're streaming from the servers? Thanks, and if you need it the debug info is below:

{"ns":"yt","el":"detailpage","cpn":"cb0nvvxlOQUpdZdn","docid":"4d0B0Dli-1g","ver":2,"referrer":"https://accounts.google.com/signin/challenge?continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Fhl%3Den%26feature%3Dsign_in_button%26app%3Ddesktop%26next%3D%252Fwatch%253Fv%253D4d0B0Dli-1g%26action_handle_signin%3Dtrue&service=youtube&hl=en&checkedDomains=youtube&checkConnection=youtube%3A350%3A1&pstMsg=1","cmt":"55.148","plid":"AAUc-wsj4BW3uLap","ei":"CA3JVe7DKMWtqgXYzICoAg","fmt":"271","fs":"0","rt":"1371.53","of":"Y-46tEBbkDMTcW2Ic_IMcw","adformat":null,"content_v":null,"euri":"","subscribed":"1","lact":53,"live":null,"cl":"100036190","mos":0,"osid":null,"state":"4","vm":null,"volume":100,"c":"WEB","cver":"html5","cplayer":"UNIPLAYER","cbr":"Chrome","cbrver":"45.0.2454.26","cos":"Windows","cosver":"10.0","hl":"en_US","cr":"US","len":"912","fexp":"3300110,3300134,3311879,3312231,3312381,3312701,9407157,9407168,9408521,9408710,9409171,9413123,9415365,9415435,9415485,9416023,9416126,9416729,9417192,9417203,9417926,9418009,9418083,9418153,9418330,9418573","afmt":"251","at":"2_1","allowed":"1_2,1_2_1,1_1,1_3,2_2_1,2_2,2_1,2_3","vct":"55.148","vd":"912.000","vpl":"0.000-4.524,4.724-49.791,49.991-55.148,","vbu":"48.048-106.772,","vpa":true,"vsk":false,"ven":false,"vpr":1,"vrs":4,"vns":2,"vec":null,"lct":"55.148","lsk":false,"lmf":true,"lbw":"436465.184","lhd":"0.224","ltd":"222.558","laa":"itag=251,seg=10,range=2055515-2073287,time=105.8-106.8","lva":"itag=271,seg=19,range=52561513-54778262,time=103.6-106.8","lar":"itag=251,seg=11,range=2134065-2320866,time=110.0-120.0","lvr":"itag=271,seg=20,range=54778263-57314526,time=106.8-112.0","lvh":"r5---sn-vgqsener","lab":"40.001-106.861,","lvb":"48.048-106.772,","debug_videoId":"4d0B0Dli-1g","gpu":"ANGLE_(NVIDIA_GeForce_GTX_980_Direct3D11_vs_5_0_ps_5_0)","cgr":true,"debug_playbackQuality":"hd1440","debug_date":"Mon Aug 10 2015 17:06:48 GMT-0400 (Eastern Daylight Time)"}

[Arty]

i can watch 4k, on my 25mbps connection.

did you check, other pcs broswers etc, normally troubleshooting stuff 

[joshnoodle]

i can watch 4k, on my 25mbps connection.

did you check, other pcs broswers etc, normally troubleshooting stuff 

Tried Edge and IE on Windows 10. Followed Youtube's guide for troubleshooting: https://support.google.com/youtube/checklist/3480866?hl=en&ref_topic=6077002

[Arty]

Tried Edge and IE on Windows 10. Followed Youtube's guide for troubleshooting: https://support.google.com/youtube/checklist/3480866?hl=en&ref_topic=6077002

dif pcs?

wifi/Ethernet 

[joshnoodle]

dif pcs?

wifi/Ethernet 

Changed to laptop. Fine

Changed to WiFi. Fine

Testing things I turned off QoS. Works on Ethernet now. What? Must be a bug with the Firmware detecting Youtube as an uplink source and throttling it to the 4Mbps uplink. Thanks for your help.