[سؤال] استفسار بسيط بخصوص الريجكس

كود :
https://r2---sn-uxaxjvhxbt2u-j5pel.googlevideo.com/videoplayback?requiressl=yes&source=youtube&dur=1136.245&lmt=1503567600822409&gir=yes&signature=9C445824067A912D12FF4BA0F4B9C4B589A75E13.80D9CB31397ECF3DB560E1647CADF95B7415DEBD&key=yt6&sparams=clen,dur,ei,gir,id,initcwndbps,ip,ipbits,itag,lmt,mime,mm,mn,ms,mv,pcm2,pl,ratebypass,requiressl,source,expire&clen=52645786&ipbits=0&initcwndbps=97500&ip=197.42.66.68&pl=22&mt=1514325360&mv=m&ei=1MVCWuTOF86g1wKV_qKgBw&ms=au&mm=31&mn=sn-uxaxjvhxbt2u-j5pel&pcm2=yes&id=o-AKrLPyI1eIJJ7E_or0ugZGSWGOZdlfxOlRSfAWeiq7K2&mime=video/mp4&expire=1514347060&itag=18&ratebypass=yes&title=إصلاح القلوب كلمة للشيخ محمود هاشم 2