Index: wp-includes/js/tinymce/wp-tinymce-schema.js
===================================================================
--- wp-includes/js/tinymce/wp-tinymce-schema.js	(revision 23147)
+++ wp-includes/js/tinymce/wp-tinymce-schema.js	(working copy)
@@ -139,8 +139,8 @@
 					'legend[A|align][C|B]' +
 					'div[A|align][C]' +
 					'source[A|src|type|media][]' +
-					'audio[A|src|autobuffer|autoplay|loop|controls][source]' +
-					'video[A|src|autobuffer|autoplay|loop|controls|width|height|poster][source]' +
+					'audio[A|src|autobuffer|autoplay|loop|controls][C|source]' +
+					'video[A|src|autobuffer|autoplay|loop|controls|width|height|poster][C|source]' +
 					'hr[A|align|noshade|size|width][]' +
 					'form[A|accept-charset|action|autocomplete|enctype|method|name|novalidate|target|onsubmit|onreset|accept][C]' +
 					'fieldset[A|disabled|form|name][C|legend]' +