Just to tell you that YouTubeNails 2.0.0 is available http://wordpress.org/extend/plugins/youtubenails/
Now it's a widget that you can configure on wp-admin
You can see it working here:
I'd thank you if somebody could tell me if is using it, and I'm always open for comments. This new version was based on the suggestions by Myrioscope.
Hope you find it usefull.