Ing Windows Media Video (WMV) metung yang compressed video file format para kareng mapilang proprietary codec a gewa ning Microsoft. Mediseniu ya ing orihinal a codec (a ausan dang WMV) para kareng Internet streaming application, anting metung a kakumpitensia king RealVideo. Deta namang aliwang codec (alimbawa ing WMV Screen ampo ing WMV Image) para karen lang makabukud o partikular a laman. Uli ning kayang pamipara-pareu (standardization) kapamilatan ning Society of Motion Picture and Television Engineers (SMPTE), mepili yang gamitan ing WMV para kareng pisikal a format (physical-delivery formats) anti king HD DVD ampong Blu-ray Disc.