🎁 Update theme show pages with video embed

This commit updates the scholarly theme's show page to handle video embed

Issue:
- #911

app/views/themes/scholarly_show/hyrax/base/show.html.erb

@@ -16,30 +16,32 @@
       <div class="panel-body">
         <div class="row">
           <%= render 'workflow_actions_widget', presenter: @presenter %>
-          <% if @presenter.iiif_viewer? %>
+          <% if @presenter.video_embed_viewer? %>
+            <%= render 'video_embed_viewer', presenter: @presenter %>
             <div class="col-sm-12">
+              <div class="image-show-description">
+                <% render 'work_description', presenter: @presenter %>
+              </div>
+            </div>
+          <% elsif @presenter.iiif_viewer? %>
+            <div class="col-sm-12 centered-media">
               <%= render 'representative_media', presenter: @presenter, viewer: true %>
             </div>
             <div class="col-sm-12">
               <div class="image-show-description">
-                <%= render 'work_description', presenter: @presenter %>
+                <% render 'work_description', presenter: @presenter %>
               </div>
             </div>
-          <% elsif Flipflop.default_pdf_viewer? && @presenter.show_pdf_viewer? && @presenter.file_set_presenters.any?(&:pdf?) %>
+          <% elsif @presenter.pdf_viewer? %>
             <div class="col-sm-12">
               <%= render 'pdf_js', file_set_presenter: pdf_file_set_presenter(@presenter) %>
             </div>
-            <div class="col-sm-12">
-              <div class="image-show-description">
-                <%= render 'work_description', presenter: @presenter %>
-              </div>
-            </div>
           <% else %>
             <div class="col-sm-3 mb-1">
-              <%= render 'representative_media', presenter: @presenter, viewer: false unless @presenter.iiif_viewer? && @presenter.file_set_presenters.any?(&:pdf?) %>
+              <%= render 'representative_media', presenter: @presenter, viewer: false %>
             </div>
             <div class="col-sm-9">
-              <%= render 'work_description', presenter: @presenter %>
+              <% render 'work_description', presenter: @presenter %>
             </div>
           <% end %>
         </div>