SWF is a file format for multimedia, vector graphics and ActionScript in the Adobe Flash environment. Originating with FutureWave Software, then transferred to Macromedia, and then coming under the control of Adobe, SWF files can contain animations or applets of varying degrees of interactivity and function. SWF file can be played directly in web browser, such as Internet Explorer. However, FLV file can not be playback directly, because it requires a separate SWF file which reads the video content from FLV. 

So want to publish your website and insert a SWF file by converting FLV to SWF into it as below.

Q: How can I put swf video and flv audio together?

I have an swf file which contains pictures in it (like a presentation) and an flv file that contains the audio track. I want to show these on my website playing together. How can I do this? Do I need to put them into a single file somehow?

Q2: How can i convert downloaded youtube flv videos into swf format?

Can anyone tell me how to convert downloaded youtube flv videos into swf format? pls?

YouTube FLV to SWF Video Converter is the most powerful product to get flv videos from YouTube.com and convert them to other video formats. With it’s the powerful FLV Converter”, you could easily convert Flash FLV videos from YouTube, Hulu, Facebook, etc to SWF format.