You're halfway there. If you want a YouTube video posted, use, correctly as you mentioned, the "
function on either side. But in between these two, add instead of the direct link to the video, use the embed text of the video, which is posted on the right hand side or underneath the YouTube videos. An embed text can look like this:
<object width="560" height="340"><param name="movie" value="http://www.youtube.com/v/qrO4YZeyl0I&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/qrO4YZeyl0I&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="560" height="340"></embed></object>
The embed text for the Bad Romance by Lady Gaga video, as an example.