What is Flash FLV?
Wikipedia: Flash Video is a container file format used to deliver video over the Internet using Adobe Flash Player versions 6–10.
Flash Video has been accepted as the default online video format by many sites. Notable users of it include YouTube, Hulu, VEVO, Yahoo! Video, metacafe, Reuters.com, and many other news providers.
Flash Video is viewable on most operating systems except iOS, via the Adobe Flash Player and web browser plugin or one of several third-party programs.
What is SWF files?
SWF is the Animation created with Adobe Flash; may contain text as well as both vector and raster graphics; also may include interactive actions written in ActionScript; plays in Web browsers that have the Flash plug-in installed.
Three ways to play FLV files on computer with common players
The easiest method
Download and install VLC player. The VLC package alreaady includes software to play FLV files.
Play FLV files with Windows Media Player
To play flash flv files on Windows Media Player, you will first need to install and configure FFDShow, and then you still need to install a decoder called FLV Splitter to process the FLV container that holds both streams.
Another simple solution
Convert FLV to MP4 with a third party software called FLV Converter to play directly with QuickTime Player, iTunes or transfer to watch on your portabler players iPod, iPhone, iPad, psp. Or convert FLV to AVI to play with Windows Media Player.
For Mac users, you can do the same with FLV Converter for Mac. If you want to import your Flash files to edit FLV with iMovie, Final Cut Express(FCE) or Final Cut Pro(FCP), just convert FLV to MOV mac format will make it.
How to play SWF files without web-browser?
However, sometimes, you may want to play these SWF video files such as Flash games or Flash animation offline when you can not log on Internet?
Convert SWF to MP4 really sounds like a good ideal play swf files on your local computer with QuickTime Player or iTunes and transfer the converted Flash animations to your newly purchased iPhone 4, iPad 2 to enjoy on the move.
For Mac users, you may find there are hardly any software on Mac that supports to play SWF files. Fortunately, with SWF Converter for Mac, you can free download on line SWF files to your local and then convert SWF to MP4 Mac to play SWF with QuickTime player, iTunes. Or convert SWF to FLV Mac to upload to the Flash SWF files on Youtube to share with more people.