zurb-foundation-5/doc/includes/flex_video/examples_flex_video_mixin.html

Foundation 5 for npm (no code modification from original repo)

{{#markdown}}
```html
<div class="your-class-name">
  <iframe width="420" height="315" src="http://www.youtube.com/embed/0_EW8aNgKlA" frameborder="0" allowfullscreen></iframe>
</div>
```
{{/markdown}}