Added video element support

Author: Aram Taieb

src/document.js

@@ -1,6 +1,7 @@
 import {Canvas} from './canvas'
 import Image from './Image'
 import {Element} from './element'
+import Video from './video';
 
 const stack = {}
 
@@ -38,6 +39,10 @@ export default {
         return new Image()
       }
 
+      case 'video': {
+        return new Video();
+      }
+
       default: {
         return new Element()
       }

src/video.js

@@ -0,0 +1,8 @@
+export default function() {
+    const video = wx.createVideo({width: 0, height: 0, controls: false})
+    video.canPlayType = () => {
+        return true;
+    }
+    return video
+  }
+