     else
       source_options = {}
     for i, path of paths
-      source_options['src'] = H.audioPath path, path_options
-      content += H.tag 'source', source_options
-    H.contentTag 'audio', content, options
+      source_options['src'] = @audioPath path, path_options
+      content += @tag 'source', source_options
+    @contentTag 'audio', content, options
 
-helper 'autoDiscoveryLinkTag', (type = 'rss', url = H.domain.app, options = {}) ->
-  options = H._clone options
-  options['href']   = H.assetUrl(url || H.domain.app)
+helper 'autoDiscoveryLinkTag', (type = 'rss', url = @domain.app, options = {}) ->
+  options = @_clone options
+  options['href']   = @assetUrl(url || @domain.app)
   options['rel']  ||= 'alternate'
   unless options['type']
     if type == 'rss'

  path_options['format'] = options['format']
  options['format'] = undefined
  if paths.length == 1
    options['src'] = H.audioPath paths[0], path_options
    H.tag 'audio', options
  else
    content = ''
    source_options


  result = ''
  for index, source of sources
    options['href'] = @stylesheetPath source, path_options
    result += @tag 'link', options
  result

helper 'videoTag', (paths...) ->
  options = if typeof paths[paths.length - 1] == 'object'
    @_clone paths.pop()
  else
    {}

  handleSizeAttribute options
  options['poster'] = @imagePath(options['poster']) if options['poster']

  path_options = {}
  path_options['format'] = options['format']
  options['format'] = undefined
  if paths.length == 1
    options['src'] = @videoPath paths[0], path_options
    @tag 'video', options
  else
    content = ''
    source_options
