Maybe another idea, would be to use a responsive plugin
which makes swf movies responsive along with top-flash-embed plugin
(maybe this will be added as an option in a later update)
https://www.ads-software.com/plugins/tags/responsive
and use a full-page container for the swf movie
Thus the movie will stretch to full-browser dimensions (very close to full-screen)
Beware, the swf movie must implement this responsive option in its code
Most swf movies will stretch with no issue, however for swfs which
have programmatic graphics, they need to implement such option in their code
This, in actionscript, is an event when the scene resizes, the code adjusts the dimensions of the objects accordingly
Hope this helps