CMS Made Simple Forums

Can anyone tell me how to add this youtube tag to the CMS? Do i need to make an PHP file? or do i need to donwload one? Hope someone can help this newbie. Just create a user defined tag (Extensions -> User Defined Tag). Click on Add User Defined Tag Enter the tag name and paste the code in to the C...

I can setup the hierarchy as I want and I can show them up. But the other question is how can I show the breadcrumb as in the hierarchy?