this
<a class="postlink" href="http://www.youtube.com/watch?v=RPcSIN77yqU" onclick="window.open(this.href);return false;">http://www.youtube.com/watch?v=RPcSIN77yqU</a>
or maybe this:
<a class="postlink" href="http://www.youtube.com/watch?v=U1Dqsw9e-jE" onclick="window.open(this.href);return false;">http://www.youtube.com/watch?v=U1Dqsw9e-jE</a>