1. I suggest that you decrease width of any image or video embed you have in content to 500px only. The 530px width you currently have for your video is too wide that the content block causes the right sidebar to drop down in IE.
2. Create a template file named sidebar_top.php
3. Open it and add this code to make it a widget:
<div id="sidebar_top">
<ul>
<?php if ( function_exists('dynamic_sidebar') && dynamic_sidebar(1) ) : else : ?>
<li>
<h2>About Us</h2>
<p>Some text about you. Any widget you place here in admin will be overwritten anyway.</p>
</li>
<?php endif; ?>
</ul>
</div><!-- end sidebar_top -->
4. Open up your theme’s function.php and change 2 below to 3
<?php
if ( function_exists('register_sidebars') )
register_sidebars(2);
?>
5. You would have to revise following template files
404.php, archive.php, index.php, page.php, single.php and tag.php
to add this
<?php include(TEMPLATEPATH."/sidebar_top.php");?>
right above the followng:
<?php include(TEMPLATEPATH."/l_sidebar.php");?>
<?php include(TEMPLATEPATH."/r_sidebar.php");?>
6. Open up your theme’s style.css and add this:
#sidebar_top { float right: clear: right; width 320px; }
7. Save sidebar_top.php in theme folder and all revised style.css and other template files in your theme folder and FTP upload to server.