I created the many Swf files contain Video. But I want to check, if I try to play that swf file., Is it possible to get the video format, while running using actionscript?

Ex: my Swf file name is BundledVideo.swf file. This file contains Play, Pause,Stop buttons. After I opened this swf file, I tried to play the video using play button. However video is playing. In such case, Shall I get the Video format Extension , while running?

I dont want to see in librar While running itself, I need to get..

Please help me.