How to add a background color in Popular Videos -

i made the main video background :none, and now i need a last request
http://dallasblvd.com/dlife/
you see the transparency makes difficult to read the text right from main video window!!
How to ad a black background in this specific area

<!-- Popular Videos -->
<div id="tab_sidebar_popular" class="tab_sidebar_list" style="display: block;"><ul id="scroll" class="videolist1"><li></li><div class="clear"></div><li></li><div class="clear"></div><li></li><div class="clear"></div><li></li><div class="clear"></div></ul></div>
<!-- END -->

or better a background just here <li></li>

i dont know wich one look better..

 

I have seen your site and i think you have already added black background in that area you want. If not, Then please send exact screenshot of that area.

 

yeah i was playing with code THX