Question about videos in flash

Hi!

Hopefully this will be an easy question to answer. I have been doing this animation in flash and imported a video, then I've exported it as a swf file which I can play without a problem.
Then I tried to upload this swf file to a site called deviantart, where many artists upload their work and flash animations. Then everything in the animation works except the video. Is it because the video is played in some way locally and I need to publish the video on the internet to later import it as a (video) url adress in flash to make it work?

Thanks for reading!