解决video.js 在 IOS播放的时候自动全屏的问题

http://stackoverflow.com/questions/5054560/can-i-avoid-the-native-fullscreen-video-player-with-html5-on-iphone-or-android

In iOS 10 beta 4.The right code in html 5 is <video src="file.mp4" webkit-playsinline="true" playsinline="true">webkit-playsinline is for iOS 10-, and playsinline is for iOS 10+.

see details via https://webkit.org/blog/6784/new-video-policies-for-ios/