Expand video fix to #examples video (#3794)

Follow-up to #3115

Closes #3793 (and all the previous
issues about this, the fix in #3115 seems to have been
partial/incorrect)

Author: patrickhlauke

css/base.css

@@ -375,6 +375,8 @@ margin-left:.8em;
 margin-right:.8em;
 }
 
-.examples video {
+.example video,
+#examples video
+{
     max-width: 100%;
 }