F4V is a filename extension for Flash Video (FLV) container format. It supports H.264 (MPEG-4 AVC) video codec compression standard, which is known to offer significant compression. FLV videos come in multiple formats apart from F4V, including F4P, F4A, and F4B. Also, it opens on Adobe Flash Player 6 or later and Windows Media Player.
Windows Media Player Adobe Flash Player 6 or later Media Monkey
DivX is a video codec brand developed by DivX, LLC. This video codec is mainly compatible with Windows programs, although it can also be embedded on game consoles, alar clocks, car stereo, and more. Today, there are three primary DivX codecs, including MPEG-4 Part 2, HEVC Ultra HD, and H.264/MPEG-4 AVC DivX Plus High Definition video codec.
DVD/Blu-ray Players Alarm Clocks Car Stereo X-Box 360