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 multimedia format container which is widely used for packaging video and audio streams, posters, subtitles and metadata. Exists support for streaming. Metadata is sent with the file, which contains all information necessary for broadcasting. Exists possibility to pack multiple streams simultaneously and MPEG-4 standard, which belongs to the format, supports a reasonable amount of data formats.