WMV is a time capsule from the Windows XP years: tidy little files with dated manners. It was born in 1999, Microsoft, and its real weak spot is everything Apple, most browsers, and any phone made this decade.
GIF is the internet's court jester: 1987 technology that still runs every group chat. An animated image format: every frame is stored with a 256-color palette, there's no audio track and no inter-frame compression. That makes it the right destination when what you need is short, silent, autoplaying loops that work absolutely everywhere.