Filepicker popup is covered when placed over an embedded video.

Requirements

• Enable the youtube repository plugin
• Enable multimedia filters

Steps to reproduce:

• Add a forum activity to the course
• Create a forum topic
• Click Moodle Media in the textarea
• Add a couple of youtube videos from the youtube video repository
• Save forum topic
• Post a reply to your topic
• Click Moodle Media in the textarea
• Open the Moodle filepicker
• Move the filepicker popup window over the embedded videos

Notice the header of the filepicker window is layered below the embedded video markup.

I haven't been able to determine what exactly is the issue. So I can't submit a patch right now.

However I did have a similar issue with a contributed module I developed, where by I was using a YUI panel to load a flash widget and the WYSIWYG icon bar was being layered over top of my flash widget. To resolve the issue I ended up hiding the WYSIWYG icon bar iframe when my popup panel was rendered. Then on the panel close event I simply make the WYSIWYG icon bar visible again.