Merge pull request #1367 from allmonday/dev

adding poster attribute for video component.

src/dom_components/model/ComponentVideo.js

@@ -17,6 +17,7 @@ module.exports = Component.extend(
       ytncUrl: 'https://www.youtube-nocookie.com/embed/',
       viUrl: 'https://player.vimeo.com/video/',
       loop: 0,
+      poster: '',
       muted: 0,
       autoplay: 0,
       controls: 1,
@@ -178,6 +179,12 @@ module.exports = Component.extend(
           placeholder: 'eg. ./media/video.mp4',
           changeProp: 1
         },
+        {
+          label: 'Poster',
+          name: 'poster',
+          placeholder: '',
+          changeProp: 1
+        },
         this.getAutoplayTrait(),
         this.getLoopTrait(),
         this.getControlsTrait()

src/dom_components/view/ComponentVideoView.js

@@ -12,7 +12,7 @@ module.exports = ComponentView.extend({
     this.listenTo(this.model, 'change:src', this.updateSrc);
     this.listenTo(
       this.model,
-      'change:loop change:autoplay change:controls change:color change:rel change:modestbranding',
+      'change:loop change:autoplay change:controls change:color change:rel change:modestbranding change:poster',
       this.updateVideo
     );
     this.listenTo(this.model, 'change:provider', this.updateProvider);
@@ -67,6 +67,7 @@ module.exports = ComponentView.extend({
         videoEl.loop = md.get('loop');
         videoEl.autoplay = md.get('autoplay');
         videoEl.controls = md.get('controls');
+        videoEl.poster = md.get('poster');
     }
   },