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YouTube 0&&ua.toLowerCase().indexOf("webkit")<0&&ua.indexOf("Edge")< 0&&ua.indexOf("Trident")<0&&ua.indexOf("MSIE")<0}ytcsi.setStart(w.performance?w.performance.timing.responseStart:null);var isPrerender=(d.visibilityState||d.webkitVisibilityState)=="prerender";var vName=!d.visibilityState&&d.webkitVisibilityState?"webkitvisibilitychange":"visibilitychange";if(isPrerender){var startTick=function(){ytcsi.setStart();d.removeEventListener(vName,startTick)};d.addEventListener(vName,startTick,false)}if(d.addEventListener)d.addEventListener(vName,function(){ytcsi.tick("vc")}, false);if(isGecko()){var isHidden=(d.visibilityState||d.webkitVisibilityState)=="hidden";if(isHidden)ytcsi.tick("vc")}var slt=function(el,t){setTimeout(function(){var n=ytcsi.now();el.loadTime=n;if(el.slt)el.slt()},t)};w.__ytRIL=function(el){if(!el.getAttribute("data-thumb"))if(w.requestAnimationFrame)w.requestAnimationFrame(function(){slt(el,0)});else slt(el,16)}})(window,document);
AboutPressCopyrightContact usCreatorAdvertiseDevelopersTermsPrivacyPolicy & SafetyHow YouTube worksTest new features

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AboutPressCopyrightContact usCreatorAdvertiseDevelopersTermsPrivacyPolicy & SafetyHow YouTube worksTest new features