Slow/Broken YouTube Playback Help

{"ns":"yt","el":"detailpage","cpn":"SRbCIxnemCBttfF6","docid":"Ryu2tXAsQuo","ver":2,"referrer":"https://www.youtube.com/feed/subscriptions","cmt":"160.117","plid":"AAUePAbUF_6UP5sZ","ei":"PBbeVaP5M8LZqQWFhIewDg","fmt":"298","fs":"0","rt":"268.767","of":"cSTCTPlzS8OvP-cNYCXIew","adformat":null,"content_v":null,"euri":"","subscribed":"1","lact":2,"live":null,"cl":"101538970","mos":0,"osid":null,"state":"8","vm":"CAE","volume":100,"c":"WEB","cver":"html5","cplayer":"UNIPLAYER","cbr":"Firefox","cbrver":"40.0","cos":"Windows","cosver":"6.3","autoplay":"1","hl":"en_US","cr":"US","len":"200.783","fexp":"9405348,9407610,9408213,9408710,9409069,9409206,9414603,9414976,9415365,9415485,9416023,9416126,9416343,9416838,9417626,9417707,9418012,9418153,9418201,9418204,9418223,9418394,9418448,9419178,9419446,9419817,9420022","feature":"g-subs-u","afmt":"140","vct":"160.117","vd":"200.783","vpl":"0.000-160.117,","vbu":"0.000-200.783,","vpa":false,"vsk":false,"ven":false,"vpr":1,"vrs":3,"vns":2,"vec":null,"lct":"160.037","lsk":false,"lmf":true,"lbw":"339463.846","lhd":"0.173","ltd":"47.361","laa":"itag=140,seg=20,range=3177601-3189821,time=200.0-200.8","lva":"itag=298,seg=39,range=62107638-62804919,time=197.6-200.7","lar":"itag=140,seg=20,range=3177601-3189821,time=200.0-200.8","lvr":"itag=298,seg=39,range=62107638-62804919,time=197.6-200.7","lvh":"r4---sn-5uaezn6l","lab":"0.000-200.783,","lvb":"0.000-200.733,","ismb":1420000,"debug_videoId":"Ryu2tXAsQuo","cgr":true,"debug_playbackQuality":"hd720","debug_date":"Wed Aug 26 2015 15:44:55 GMT-0400 (Eastern Standard Time)"}

ISP is AT&T Uverse in north Georgia. For about a month now seemingly at random times Youtube videos will download at a maximum of 400 kb/s for me. Usually sitting at 200. When things are normal I'll usually be downloading them between 1 and 2 MB/s. Normally I'd think AT&T was throttling. But the speeds were very slow even on a VPN.

/r/youtube Thread