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 format established by Japanese companies in 2006. Designed for storage of video in resolution HD. The basis of lay encryption algorithm MPEG-2. Today, there are two HD-resolution videos: 1080p and 720p. This format is positioned as a direct alternative to obsolete DV in the home video recording sphere.