iframe elements require a meaningful title attribute

TNL-1675

cms/djangoapps/models/settings/course_details.py

@@ -215,7 +215,7 @@ class CourseDetails(object):
         # the right thing
         result = None
         if video_key:
-            result = '<iframe width="560" height="315" src="//www.youtube.com/embed/' + \
+            result = '<iframe title="YouTube Video" width="560" height="315" src="//www.youtube.com/embed/' + \
                 video_key + '?rel=0" frameborder="0" allowfullscreen=""></iframe>'
         return result
 

cms/templates/settings.html

@@ -263,7 +263,7 @@ CMS.URL.UPLOAD_ASSET = '${upload_asset_url}';
                   <label for="course-overview">${_("Course Introduction Video")}</label>
                   <div class="input input-existing">
                     <div class="current current-course-introduction-video">
-                      <iframe width="618" height="350" src="" frameborder="0" allowfullscreen></iframe>
+                      <iframe width="618" height="350" title="Course Introduction Video" src="" frameborder="0" allowfullscreen></iframe>
                     </div>
                     <div class="actions">
                       <a href="#" class="remove-item remove-course-introduction-video remove-video-data"><span class="delete-icon"></span>${_("Delete Current Video")}</a>

lms/templates/index.html

@@ -74,7 +74,7 @@
       if self.stanford_theme_enabled():
         youtube_video_id = "2gmreZObCY4"
     %>
-    <iframe width="640" height="360" src="//www.youtube.com/embed/${youtube_video_id}?showinfo=0" frameborder="0" allowfullscreen></iframe>
+    <iframe title="YouTube Video" width="640" height="360" src="//www.youtube.com/embed/${youtube_video_id}?showinfo=0" frameborder="0" allowfullscreen></iframe>
   </div>
 </section>
 

lms/templates/lti.html

@@ -39,6 +39,7 @@
     % else:
         ## The result of the form submit will be rendered here.
         <iframe
+            title="Form Result"
             class="ltiLaunchFrame"
             name="ltiFrame-${element_id}"
             src="${form_url}"