Before the dominance of MP4 and streaming-optimized codecs, the format was the standard for Windows users. Many creators during the 2005–2012 era exported their work in WMV because it was the default output for Windows Movie Maker, the primary tool for amateur editors at the time.
Some of the lines feel a bit "on the nose," emphasizing the betrayal rather than letting the actors' performances show the internal struggle. pkf brother spy kills sister spy wmv