The phrase "Gangnam Style" is a Korean neologism that refers to a lifestyle associated with the Gangnam District of Seoul. The song and its accompanying music video went viral in August 2012 and have influenced popular culture worldwide since then.
The Video became viral from its creativeness and comical nature.
The Video effected popular culture because everyone is doing the dance.
I believe the video will still be around in 10 years because people will continue to do the dance like the shopping cart and the sprinkler they will always be classics.