Pausing a targeted video onRelease

On a particular page I have a flash button link to pop-open a new window. If they click on this I want to pause the video. They live in two separate flash files. How do I link the flash button to pause that streaming video?

Somthing like this? How would i reference the clip on the page in place of _root?

on (release) {
_root.videoStream.pause();
}