SWF is a file format used for multimedia content such as animations and interactive applications. It was developed by Adobe for use with the Flash Player plugin. SWF files are commonly used in web design and online games but have become less popular due to the discontinuation of Flash support.
FLV is a video format commonly used for streaming videos over the web. It’s supported by Adobe Flash Player and offers high compression rates, making it ideal for online video content. FLV files are used by many video-sharing platforms but are less commonly supported by modern devices compared to MP4.