Try REVERT all templates and css of Featured Content, and then run Get Support to clear cache. If it still doesn't work, give me acp access so I can test it.
@Joel R
1. It can not save 0 because of it knows 0 is unlimited. You should use permissions to disallow a group to post video.
2. The lang is catetory_desc and come from Links Directory
5. Do you mean the 'Promote' button? It's next to the Follow button
6. It's a bug, I will fix it in next version.