I pasted the text and pressed enter then this appeared in red font:

Initial replacements took 82ms. /csi_204?v=2&s=youtube&action=home&yt_sts=n&yt_ad=1&st=1341&vph=636&vpw=1226&yt_eil=1&GetBrowse_rid=0x833c2ad0c9c27251&yt_fn=what_to_watch&yt_li=1&yt_lt=cold&c=WEB&cver=1.20180920&is_nav=1&csn=VcClW-zAPMa2kwbf5IfADw&p=h2&t=quic&yt_vis=1&rc=sj&all_vc=8766,8767&rt=cfg.2461,je.4767,jl.4782,ol.7350,vpc.8337,vpcc.8398,lim.4036,vpl.4036,vc.8767,dcp.8804,srt.305,fpt.2112,nreqs.147,nress.305,nrese.2497,ndnss.96,ndnse.142,ntcps.143,ntcpe.192,nstcps.143,wffs.5712,wffe.7093,rsf_sj.638,rse_sj.711,aft.7350,ps.8856:1 Failed to load resource: net::ERR_BLOCKED_BY_CLIENT base.js:3883 Active resource loading counts reached to a per-frame limit while the tab is in background. Network requests will be delayed until a previous loading finishes, or the tab is foregrounded. See https://www.chromestatus.com/feature/5527160148197376 for more details googleads.g.doubleclick.net/pagead/id:1 Failed to load resource: net::ERR_BLOCKED_BY_CLIENT www.google.com/pagead/lvz?pg=index&evtid=AAu-c7Xze28AsAmYmk4cr74nQ0_EHWqoQ1nsF3lnAZEATYts3rB3VwXi9XE9LN9gnOoF1wN_uYZhmLVaOkPdzBJU8NB_PEFytA&req_ts=1537589333&sigh=ADyN0hwEvGz4ZohFwh3hXqyB0cevZ5OPDg:1 Failed to load resource: net::ERR_BLOCKED_BY_CLIENT document.cookie = document.cookie.split(' ').filter(o=>o.indexOf('PREF=')!==-1)[0].replace(';','')+'&f5=30030&f6=8;domain=.youtube.com;path=/'; "PREF=f3=8&f1=50000000&f5=30030&app=desktop&cvdm=grid&f4=4000000&f6=8&f5=30030&f6=8;domain=.youtube.com;path=/"

what did i do wrong? I am using chrome on windows 10 laptop and the new youtube is really awful. I want this to work.