Ok, regarding versions of the plugin for the editor, if you look at the following, you will see that there has been a new version of the youtube plug-in created that our current version of the editor (4.3.1) does not support:
ckeditor.com/addon/youtube
So... when I update the editor, I will update the YouTube plugin, also.
I should be updating the editor in the next few weeks. I want to wait until I have worked out the bugs with FTH release before I create a potential source of new bugs.
