Do you know the movie Source Code? Good movie, watch it. Its trailer is used as example of how embed a Metacafe video into your Joomla site using the component & plugin JEmbedAll. For any other video add into Joomla articles, modules or code a text similar with this one [ metacafe = http://www.metacafe.com/watch/6106325/source_code_what_is_source_code/ ] (without spaces). Replace the URL with the one belonging to the video you want to embed. You will get something like this:
[metacafe=http://www.metacafe.com/watch/6106325/source_code_what_is_source_code/]
In the administrator section you can edit this string - you can change its name and the CSS code attached. Using the CSS code you can set the width and height of the embedded video, the position and other attributes (like the margins).