Running an extrenal swf at 12fps rather than 30-40fps

I have a main .swf that is a container for an external swf. The main swf runs at 40fps or so. So consequently, the external swf also runs at 40fps. I would like to have the external swf run at a mere 12fps because the swf contains a video. How can i make it so that the external swf runs at only 12fps? Thanks for your time and support :smiley: