correctly use video elements

templates/feed_entry.html

@@ -6,5 +6,8 @@ from <a href="{{ page_url }}">page {{ page }}</a><br />
 (url) %}
 <img src="{{ url }}" /><br />
 {% when Media::Video with (url) %}
-<video src="{{ url }}" /><br />
+<video controls>
+  <source src="{{ url }}" type="video/mp4" />
+</video>
+<br />
 {% endmatch %} {% endfor %}