<div class="grid-5-12">
<iframe width="200" height="120" src="http://www.saweb.info/videos/nightclub.mp4" frameborder="0"></iframe>
</div>
I copied above direct from an "admin page" from Firefox developer page source and it works as standalone, but on the admin page itself it doesn't appear (it always did)
It also doesn't show even without the div. (It's in a parsley form and the iframe show the "current selected video")
Tested in Chrome and it also doesn't display while I can't find any similar error on the internet.
Anyone perhaps has an idea why the iframe don't appear / disappeared please?