403. That’s an error.

Your client does not have permission to get URL /videoplayback?id=fd5e89dd6193a8a0&itag=18&source=webdrive&requiressl=yes&ttl=transient&mm=30&mn=sn-ab5l6n67&ms=nxu&mv=u&pl=48&ei=94YFWYW8HoO7qgXohrWACg&mime=video/mp4&lmt=1493519213441020&mt=1493534308&ip=2604:a880:0:1010::1b81:f001&ipbits=0&expire=1493548855&sparams=ip,ipbits,expire,id,itag,source,requiressl,ttl,mm,mn,ms,mv,pl,ei,mime,lmt&signature=AE46D3BE857F43E1E3362EB99062A40B7F8B2636.B0B5E2C4B8AD8C1B7FD533118E9183A90FE05D50&key=ck2&app=explorer&jparams=NjYuMjQ5Ljg0LjIwNg&upx=TW96aWxsYS81LjAgKFdpbmRvd3MgTlQgMTAuMDsgV2luNjQ7IHg2NCkgQXBwbGVXZWJLaXQvNTM3LjM2IChLSFRNTCwgbGlrZSBHZWNrbykgQ2hyb21lLzU4LjAuMzAyOS44MSBTYWZhcmkvNTM3LjM2&tr=2 from this server. That’s all we know.