I want to create a slightly indented background behind embedded media, for which the size varies. It should look like this:

![what it should look like](https://i.stack.imgur.com/Fhf0k.png)

See how the green background is slightly indented from the top and bottom of the youtube video? I have gotten everything else to show up as I want, I just can't figure out how to position the background slightly inside of the embedded media item. Especially since I know the media item size will change.

You can see what I have so far on [JSfiddle](http://jsfiddle.net/thwackukulele/9qeP3/).