anchor.diff:              &lt;video preload="metadata" poster="<%=video_url(document, :format => :png, :style => '170x127#')%>"&gt;&lt;source src="<%= video_url(document, :format => :webm) %>" type="video/webm"&gt;&lt;source src="<%= video_url(document, :format => :mp4) %>" type="video/mp4"&gt;&lt;source src="<%= video_url(document, :format => :flv) %>" type="video/x-flv"&gt;&lt;p&gt;Your browser does not support HTML5 video.&lt;/p&gt;&lt;/video&gt;
             </textarea>
   
  -          <button class="btn " id="btn_copy_embed" href="#" data-toggle="tooltip" data-placement="right" title="<%=t('copy_to_clip')%>">
  +          <button class="btn" id="btn_copy_embed" href="#" data-toggle="tooltip" data-placement="right" title="<%=t('copy_to_clip')%>">
   
               <i class="icon-copy large"></i>
             </button>
  
positive.code:     <div class="tab-pane <%= document_details_tab_class document, :embed %>" id="document-embed">
        <p><%=t("document.embed_explanation")%></p>      
        <div class="contentembed">
            <textarea class="shortUrl" readonly="true" rows="5" id="textarea_for_iframe" type="text">
             &lt;audio controls&gt;
             &lt;source src="<%= audio_url(document, :format => :webm) %>" type="audio/webm"&gt;
             &lt;source src="<%= audio_url(document, :format => :webm) %>" type="audio/webm"&gt;
             Your browser does not support the audio tag.
             &lt;/audio&gt;
            </textarea>
  
            <button class="btn " id="btn_copy_embed" href="#" data-toggle="tooltip" data-placement="right" title="<%=t('copy_to_clip')%>">
  
              <i class="icon-copy large"></i>
            </button>
  
negative.code:       <%= link_to (raw("<i class='icon-edit'></i> <span class='hidden-tablet hidden-phone'>")) + t('document.actions.edit')+ raw("</span>"), '#document-edit', 'data-toggle' => 'tab' %>
      </li>
      <% end %>
      <%if document.class==Video || document.class==Audio%>
        <li class="<%= document_details_tab_class document, :embed %>">
            <%= link_to (raw("<i class='icon-code'></i> <span class='hidden-tablet hidden-phone'>")) + t('excursion.actions.embed')+ raw("</span>"), '#document-embed', 'data-toggle' => 'tab' %>
        </li>
  