Embed code not embedding

[soundbarrierpro]

I turned HTML on, to allow my "trusted" guests to embed youtubes into only one forum. But, when they drop the code, the links turn into the text of the tube the original creator.
In fact all links turn into text links, like this

If I drop an msnbc link, it converts into the story link. But it still directs me where I need to go.

How can I turn that off, or stop links from doing that?

--------------- Added [DATE]1208303608[/DATE] at [TIME]1208303608[/TIME] ---------------

This doesn't happen with anybody else?