Never mind. Solved it.

by scarab @, Friday, March 29, 2013, 09:58 (4075 days ago) @ Claude Errera

I downloaded a version of mylittleforum whose change log has this as it's latest entry: 2.3.1 (2012-12-01)

But I couldn't see any youtube code.

Are you using some sort of add-on package?

Complete thread:

 RSS Feed of thread