1) Visit: https://www.duckware.com/test/webkit/iosplayvideofails.html 2) touch/click in lower box (video then plays) 3) click on the 'fullscreen' button 4) after 10 seconds, exit fullscreen 5) observe msg line: during video fullscreen, document.webkitCurrentFullScreenElement was defined, and null A workaround to this bug is that during fullscreen, webkitDisplayingFullscreen is true on the <video> element.