.
If you add something like this to the style.css file ... assuming that the name of your background image is stylebg.gif and that it is indeed located in your templates/images folder ....

Code:
body {
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
background-image: url("../images/stylebg.gif");
color: #222222;
margin: 0px;
padding: 0px;
}
... then you will see that image around the outside perimeter of your video portal, i.e. to the left and the right of your page, and also above/below if you have a margin set for it. This background will NOT appear anywhere on your actual "working" screen or if you use your browser in less than full-screen mode it may also not show up if your browser margins are the same as the page being viewed. Like I said, this will show up OUTSIDE of your working page. On the other hand, if you add something like ....

Code:
<table cellspacing="0" cellpadding="0" BORDER="0" BACKGROUND="http://www.locationofyourvidportal.com/templates/images/bgimage.gif" width="100%">
... into the header.tpl file (located in templates) then you can coordinate that background at the top, with the background that you've already added to the outside of your pages (see above). Don't ask ... just use your imagination and some image software to do it. In this case we've designed a background image (bgimage.gif) that takes up the entire table of the header. But you can also make just a shading image which just keeps on repeating itself. That's what we had at first. The shading image is a lot easier since the whole background image for the table requires a little finesse, in order to make it work together with the exterior background.

A working sample can be seen on our german language portal which looks tremendous (now). :D
http://www.meineclipshow.einfachclicken.de/
.
Cheers