I think the problem came down to allowing HTML to be embedded into forums.
In general there are PROFOUND warnings against allow embedded HTML into forum posts because it can be used to launch attacks against the site.
Example.
This is the required code to display the You-Tube Snowmobiling Video
"Breathe - the most beautiful snowmobile clip in the world"
http://www.youtube.com/watch?v=MKn9kOtVgEg
<object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/MKn9kOtVgEg?fs=1&hl=en_US"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/MKn9kOtVgEg?fs=1&hl=en_US" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>