Can I export a swf from Unity which is "local-with-filesystem"?

I'm loading a Unity-exported game swf into an AS3 wrapper which handles video playback for the web version of this game. I'm building the wrapper in FlashDevelop.

To load local FLVs with NetStream, I need my wrapper's network settings to be "local-with-filesystem". But if I do this I trigger a "Security sandbox violation" when trying to read the swf exported from Unity, which seems to default to "local-with-networking". I can get around this by making my wrapper "local-with-networking" but appending an absolute source path to my videos in my config.xml... but this solution is not available to me because I don't have control over where my game will end up being hosted. It needs to work with local references.

So... can I export a swf from Unity which is "local-with-filesystem"?

Or... how else can I make this work?

Thanks for reading!