- A README file instructing users to install a “special codec” to play the video.
- A suspicious executable file named xmph_codec.exe, masquerading as the required codec installer.
- A video file that appeared legitimate but could not be played without the “codec.”
This is downloading from the internet 101. Most good downloaders will let you filter out executable files, but on top of that good hygiene dictates if you download a media file and there is no media file.... Delete it.