How to use "local" code in an embedded s2member shortcode?

Hi
We use [embed]http://www.oursite.com/?s2member_file_download=video.mp4[/embed] in our posts to serve the video playable for our members. However I also want to use Amazon s3. So I should be use “s3” and “local” codes in an embed codes. “local” code for locally hosted videos and s3 code for amazon s3 uploaded videos. How to use them? When I use it in the ?s2member_file_download= code then video goes unplayable (resources error etc.).