- Navigate to `My Documents/My Games/Sid Meier's Civilization V/` on a PC or `~/Documents/Aspyr/Sid Meier's Civilization 5` on a Mac.
- Look for the file "Usersettings.ini" and open it in a text editor like Notepad
- Search for the variable "SkipIntroVideo = 0"
- Change the 0 to 1

Enjoy your shiny, intro vid free Civ!