Looping external swf which has no .fla


I have a sliding menu with buttons - each button calls an external swf - which plays in an empty movie clip.

Now, I want the current loaded swf to loop till the time the user clicks on another button. The problem is, I do not have the fla files for any of the external swfs (these are screencam recordings using a software that does not publish .fla) - so I can’t put a code at the end of each external swf asking it to not stop.

Any suggestions on how I might be able to have the external swf loop?

Thanks & Regards,
~ Raven