Ok. So to embed a youtube video, you enclose the link to the video in a ((youtube http://www.youtube.com/watch?v=Hg8Vq6w0JSE)) macro.

Or you can go mad and post
((youtube <object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/Hg8Vq6w0JSE&rel=1&border=0"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/Hg8Vq6w0JSE&rel=1&border=0" type="application/x-shockwave-flash" wmode="transparent"width="425" height="355"></embed></object>))

Not that it will do any good, because the colours and everything of the embedded player are set.

Don't want to see embedded videos? As usual with HuSi, you can turn it off. Go you your interface prefs and set the embedded youtube pref to "No" and you'll just see a link instead.