FLV (Flash Video) was the standard format for web video before HTML5. It is still used by some older platforms and video editors.
FLV support has declined since Adobe Flash was discontinued. Most modern browsers no longer play FLV natively, but media players like VLC still support it.
Mainly for compatibility with older web platforms or video editing workflows that specifically require FLV input.
FLV requires a Flash player to embed, which is no longer supported in modern browsers. Use MP4 or WebM for web video instead.
VLC Media Player supports FLV on all platforms. Some older media players also support it with the right codec pack.
FLV typically uses the Sorenson Spark or VP6 video codec and MP3 or AAC audio codec.
No. FLV is a video container format. SWF is a Flash application format that can contain FLV video but also includes interactive elements.