If you are wondering how to convert swf to flv, here I maybe give you a hand. I recommend you use the iwisoft flash swf to video converter, which is the best video converter I've ever used. It can not only help you finish your converting, but also upload your flv to Youtube, thus you can show off your flv to people all around the world. Wonderful, isn't it?

More info in detail: http://www.flash-swf-converter.com

Steps:
1). Download and install iwisoft flash swf to video converter.

2). Input Flash SWF file from local computer.

3). Click "Settings" button. Under "Output format", select "FLV" as the target. You can choose a video profile or customize the video and audio parameters as you like. Then click "OK" button to save the settings.
http://www.flash-swf-converter.com/images/flash_to_flv.jpg

4). Click the "Capture" button to start converting.

5). Click "Finish" button when you see the frame that you want to set as the last frame.