Convert ETRG to AVI

Users searching for etrg to avi conversion often think that they need to convert "etrg" videos downloaded from p2p networks (torrents) to some standard video format like AVI, but that is not the case. There is no "etrg" format, it's just added to the file name of the video as some kind of brand of the warez group and the actual file extension is hidden in your system. You have to enable hidden extension in your system to check out the actual format of the video. Media players should recognize it regardless of the file ending though.