Embed Video in a Wiki resource does not appear unless I refresh

I can get an embedded video to play if I use the html clean="false" command.

However, after I save it does not appear. I have to refresh the page then it appears.

Here is a sample page to look at:

http://next.dev.curriki.org/xwiki/bin/view/Coll_Group_SampleCurrikiGeometryCourse/WikiExamplewithLinksandMovie?&bc=;Coll_Group_SampleCurrikiGeometryCourse.SampleCourse

Minor issue but I want to make sure it is not part of a bigger issue.