FLV, short for Flash Video, is a popular multimedia container format used for delivering video content over the internet. Developed by Adobe Systems, FLV files are widely supported by various media players and web browsers.

FLV files are known for their small file size and high compression capabilities, making them ideal for streaming videos online. They utilize the H.264 video codec and AAC audio codec, ensuring excellent video and audio quality.

One of the key advantages of FLV is its ability to support interactive features, such as cue points and metadata, enabling developers to create engaging video experiences. Additionally, FLV files can be easily embedded into web pages using HTML5's  tag or Adobe Flash Player.

In conclusion, FLV is a versatile video format that offers efficient compression, excellent quality, and interactive capabilities, making it a preferred choice for online video streaming and web development.