     <iframe src={content_url} />
 
 Video = React.createClass
+  displayName: "Video"
   mixins: [StepMixin]
   isContinueEnabled: -> true
   onContinue: ->

      overlay.innerHTML = title
      img.parentElement.appendChild(overlay)

Interactive = React.createClass
  mixins: [StepMixin]
  isContinueEnabled: -> true
  onContinue: ->


  componentDidMount:  -> @insertOverlays()
  componentDidUpdate: -> @insertOverlays()

  insertOverlays: ->
    root = @getDOMNode()
    {title} = TaskStepStore.get(@props.id)
    for img in root.querySelectorAll('.splash img')
      continue if img.parentElement.querySelector('.ui-overlay')
      overlay = document.createElement('div')
      # don't apply overlay twice or if cnx content already includes it
      continue if img.parentElement.querySelector('.tutor-ui-overlay')
