There are two different video file formats known as Flash Video: FLV and F4V. The audio and video data within FLV files are encoded in the same manner as they are within SWF files. The F4V file format is based on the ISO base media file formatand is starting with Flash Player 9 update 3.
Is a cross-platform container format that is used for professional video and audio. It allows you to store completed projects and files with streaming, as well as data that has been compressed by any algorithm.