New option: screenshot; Hiding comment box bug; Hotkey conflict bug

index.html

@@ -61,6 +61,7 @@
         autoplay: false,
         theme: '#FADFA3',
         loop: true,
+        screenshot: true,
         video: {
             url: 'http://devtest.qiniudn.com/若能绽放光芒.mp4',
             pic: 'http://devtest.qiniudn.com/若能绽放光芒.png'