Apr 5, 2017 . Video Codecs. SWF file format version (publish version). Minimum Flash Player version (required for playback) . that are derived from the standard MPEG-4 container format Flash Video is a container file format used to deliver digital video content over the Internet using MPEG-4 video encodings also add three bytes for composition timestamp offset which is required for encodings that use B-frames. We assume that you already have some video in a format other than FLV or a compatible version of MPEG-4. Many leading video editing tools allow In some cases it will merely download the video file to their system. embed videos in Windows Media, Real Media, Quicktime, MPEG-4, and Flash formats.