bg video

components.my-component.js

import Ember from 'ember';

const {
  computed,
  get
} = Ember;

export default Ember.Component.extend({
  className: 'my-component',
  background: null,
  backgroundStyle: computed('background', function() {
    let arr = [];
    let background = get(this, 'background');
    if (background) {
      arr.push(`background-image: url(https://dl.dropboxusercontent.com/u/1640776/test/${background}.png)`);
    }
    return arr.join('; ').htmlSafe();
  }),
  isMobileDevice: computed(function() {
    return /Android|webOS|iPhone|iPad|iPod|BlackBerry/i.test(navigator.userAgent);
  })
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.my-component {
  display: block;
  height: 100vh;
  width: 100%;
}
.bg {
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
  bottom: 0;
  display: block;
  left: 0;
  overflow: hidden;
  position: absolute;
  right: 0;
  top: 0;
}
.bg-video {
  height: auto;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: auto;
}

templates.application.hbs

{{my-component background="form-loop"}}

templates.components.my-component.hbs

<div class="bg" style={{backgroundStyle}}>
	{{#unless isMobileDevice}}
  	<video loop autoplay class="bg-video" poster="https://dl.dropboxusercontent.com/u/1640776/test/{{background}}.jpg">
    	<source src="https://dl.dropboxusercontent.com/u/1640776/test/{{background}}.mp4" type="video/mp4">
  		<source src="https://dl.dropboxusercontent.com/u/1640776/test/{{background}}.webm" type="video/webm">
		</video>
  {{/unless}}
</div>

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.6.0"
  },
  "addons": {}
}