Ok....this works on SV 8, so I assume 9 is the same.
When you render; make sure the format is .wmv, and on the drop down menu that says "template" click custom.
On the video tab, click the drop down menu for "image size" and select custom. Then, just make the width 1280 and the height 720.
Then save it as "YouTube" or something...just so you don't have to do it over and over.
That's just the size though, I don't know if you render HD or not...but I can type out all my settings if you want