I've never done this myself, but a quick [url=http://forums.b2evolution.net/search.php]search[/url] turns up several threads with people discussing this:

http://forums.b2evolution.net/viewtopic.php?t=3297&highlight=embed
http://forums.b2evolution.net/viewtopic.php?t=4187&highlight=embed
http://forums.b2evolution.net/viewtopic.php?t=1791&highlight=embed
http://forums.b2evolution.net/viewtopic.php?t=3577&highlight=embed
http://forums.b2evolution.net/viewtopic.php?t=3214&highlight=embed