The html that you need to insert into your index.tpl (or wherever you want the roller to appear) will be surrounded by the <object></object> tags.

Contact the originator of the roller you have and ask them for the proper code.

It would look something like this: NOTE THIS IS AN EXAMPLE!

Code:
<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" width="550" height="150" id="recently viewed videos" align="middle">
<param name="allowScriptAccess" value="sameDomain" />
blah blah blah more param stuff blah blah blah and on and on
</object>