World of Warcraft anniversary: Role-playing game turns 20

It's earned its creator billions of dollars and was a social network before social media was mainstream. But the online role-playing game—World of Warcraft—is also a cultural phenomenon, praised for paving the way for more women to break into gaming. As the game celebrates 20 years since its release, Al Jazeera’s Patrick Fok looks at how WoW—as it’s known to its fans—shook up the world.