Question: Who directed the video for Gangnam Style?
About the article "Gangnam Style", section "Production".

Candidate passages:
Brown appeared in a viral Youtube parody of Psy's hit song "Gangnam Style", entitled "Obama Gangnam Style!"
The video received millions of views from Twitter users in China, who reportedly believed that the real President Obama was responsible for the video. 
Popularity among notable people.
On October 3, 2012, "Gangnam Style" was mentioned during a U.S. State Department briefing when a reporter asked spokeswoman Victoria Nuland if she had heard about the song, to which Nuland replied: "No, but I bet you my daughter does.
She loves Korean pop."
She also told the international media that she planned to "dial it up" and watch the video.
A few weeks later Nuland described "Gangnam Style" as "fantastic" and added that both her daughter and her husband Robert Kagan "all love the Gangnam Style" and that she had mastered its dance moves by watching the video clip "for weeks and weeks.
"On October 9, Boris Johnson, the Mayor of London, held a speech at the 2012 Conservative Party Conference, where he admitted that "Gangnam Style is very good".
He talked about the vast variety of exports that originate from London, including television aerials which the Koreans use to watch "Gangnam Style".
He also told the audience that he and the British Prime Minister David Cameron have danced "Gangnam Style".
A few days before the conference, they performed the dance at Chequers Court in Buckinghamshire.
One of the guests who witnessed the dance remarked, "It was uproarious – they and Cameron completely brought the house down".
On October 17, "Gangnam Style" was performed by George Christensen, a member of the Australian House of Representatives.
During an interview with the French news agency AFP, UN Secretary General Ban Ki-moon revealed that he has watched "Gangnam Style" several times.
He hailed the song as a " force for world peace" and added that "there are no languages required in the musical world.
That is the power of music, that is the power of the heart.
Through this promotion of arts we can better understand the culture and civilisations of other people.
In this era of instability and intolerance we need to promote better understanding through the power of music.
"Congressman John Lewis from the U.S. House of Representatives recently danced "Gangnam Style" to promote voting.
"Gangnam Style" has been used by presidential candidates during elections.
Ju-min Park of Reuters mentioned that a few of South Korea's normally staid presidential candidates are imitating Psy's moves in an appeal to voters.
In Chile, the dance was also used by students during massive protests across the country and the Chinese dissident Ai Weiwei, who was detained by Chinese authorities in 2011 for his political activism, danced "Gangnam Style" with a pair of handcuffs as a symbol of his arrest and uploaded a video titled "Grass Mud Horse Style" onto YouTube and other Chinese websites.
According to the Associated Press, government authorities had removed the video from most websites the next day.
The Colorado Democratic Party celebrated U.S. President Barack Obama's victory at the 2012 U.S. presidential election by dancing "Gangnam Style" during the "Denver Democratic watch party".
During his speech in front of the Parliament of Malaysia, the politician Bung Mokhtar Radin drew comparisons between the youth of his country and "Gangnam Style".
He remarked "They should be like PSY and Gangnam Style.
He, his styles and his group is very popular.
Millions of people are watching his video clip, not like our youths…destroying our image of our country and our people.
"In Bali, Indonesia, "The Committee for Environmental Advocacy" staged a protest against the building of a suspended highway connecting Ngurah Rai International Airport with the city by dancing "Gangnam Style".
In the Philippines, students commemorating the 40th anniversary of the declaration of Martial law in the country danced "Gangnam Style" at Chino Roces Bridge during a protest against the former President Ferdinand Marcos' use of the military during his 14-year dictatorial rule.
The following political leaders have mentioned "Gangnam Style" on social media platforms or through speeches:The following political leaders, Congressmen and Members of Parliament have performed the dance moves of "Gangnam Style" at various locations: 
MIT Gangnam Style (also known as Chomsky Style), is a parody of the K-pop viral video, "Gangnam Style".
The lighthearted satirical video was directed by Eddie Ha '13 and produced by Ingwon Chae '14 of the Massachusetts Institute of Technology (MIT).
The video, which has been called the "Best Gangnam Style Parody Yet" by "The Huffington Post", stars MIT student Richard Yoon '13 and features cameo appearances by MIT professors Noam Chomsky, Eric Lander, and Donald Sadoway, as well as hundreds of MIT students. 
The music video for "Once in a Lifetime", was directed by Cho Soo-hyun, who also directed the music video for Psy's "Gangnam Style" and "Gentleman"; and also the music video for "This Love" from Shinhwa's "The Classic" album in 2013.
The album did not chart till July with 161,452 copies sold and total sales of 215,641 copies in South Korea The first lead single "Once in a Lifetime" charted at #1 on Hottracks Sales Chart and the second lead track, "Throw My Fist" debuted at #1 . 
"Gangnam Style" is a Korean neologism that refers to a lifestyle associated with the Gangnam District of Seoul, where people are trendy, hip and exude a certain supposed "class".
The term was listed in "Time"'s weekly vocabulary list as "a manner associated with lavish lifestyles in Seoul's Gangnam district."
Psy likened the Gangnam District to Beverly Hills, California, and said in an interview that he intended in a twisted sense of humour by claiming himself to be "Gangnam Style" when everything about the song, dance, looks, and the music video is far from being such a high class.
The song talks about "the perfect girlfriend who knows when to be refined and when to get wild".
The song's refrain "오빤 강남 스타일 (Oppan Gangnam style)" has been translated as "Big brother is Gangnam style", with Psy referring to himself.
During an interview with "The New York Times", Psy revealed that the Korean fans have huge expectations about his dancing, so he felt a lot of pressure.
In order to keep up with expectations, he studied hard to find something new and stayed up late for about 30 nights to come up with the "Gangnam Style" dance.
Along the way, he had tested various "cheesy" animal-inspired dance moves with his choreographer, including panda and kangaroo moves, before settling for the horse trot, which involves pretending to ride a horse, alternately holding the reins and spinning a lasso, and moving into a legs-shuffling side gallop.
During an interview with Reuters, Psy claimed that "Gangnam Style" was originally produced only for local K-pop fans.
On July 11, Psy and his music label YG Entertainment started releasing several promotional teasers for "Gangnam Style" to their subscribers on YouTube.
On July 15, 2012, the full music video of "Gangnam Style" was uploaded onto YouTube and was immediately a sensation, receiving about 500,000 views on its first day.
However, in Germany, an ongoing dispute between YouTube and the GEMA (the country's performance rights organization) regarding copyright issues has led to thousands of music videos including "Gangnam Style" being blocked in the country.