By Helier Cheung
International Relations professor Robert Kelly's interview about South Korea, the country where he lives, was briefly interrupted when his two small children walked in. He managed to keep his composure, and his wife ushered the two young intruders out.
The video has been viewed hundreds of million times - and delighted hundreds of thousands of people on social media. But it didn't go unnoticed that many people - including some media outlets, assumed that Prof Kelly's wife, Jung-a Kim, was the nanny.
It sparked a wider discussion about assumptions about race, gender, and mixed-race couples.
Was it reasonable to assume Ms Kim was a nanny?
Many people feel the assumption that Ms Kim was a helper, rather than the children's mother, was grounded in racial stereotypes about the roles played by Asian women.
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Not everyone thinks this is fair. Some have argued that the look of panic on Ms Kim's face, and the way she speedily ushered out the children, suggested that she was the nanny - and concerned for her job.
But others say she behaved as only a mother does - and that she was obviously worried about her husband's interview disruption.
What sort of assumptions do people make about Asian women?
When I was at university in London, most people I met assumed that I (as a British Chinese student) was studying either medicine or economics - when I was actually studying English literature.
It was a little annoying, but not a huge deal. But sometimes assumptions can be more hurtful.
One journalist of Indian descent says when she went to work at a regional newspaper, the receptionist mistook her for a cleaner, and asked her: "Are you here to clean the kitchen?"
And Kumiko Toda, an academic of Japanese descent, says a majority of people who meet her for the first time ask her where she's from - despite her growing up in the UK and having a British accent.
It also seems to have affected how some strangers interact with her.
"I was surprised when chatting about street harassment with my friends who are white - they had quite different experiences. They said they did not experience nearly as much as I did and the comments tended to be less patronising, although just as bothersome in other ways. I wonder whether my ethnicity and the perception of East Asian women as being submissive has something to do with the frequency and the nature of the harassment I experience."
Another factor that may have led to the assumptions that Ms Kim was a nanny, is the fact that many still assume, consciously or unconsciously, that people tend to date others from the same ethnic group.
Once, I was at a concert with three male friends - two white English, and one British Chinese - and everyone I spoke to assumed that I was dating the Chinese guy.
Some have argued that assuming that Ms Kim was the nanny is a sign of white-centric bias. But others have argued it's a chance for people to revisit their assumptions.
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And assumptions about race can be a two-way street.
Helen (not her real name), a Filipina nanny working in South Korea, says she has noticed that some "Koreans are very particular about skin colour" and appear to discriminate against some people with darker skin.
Meanwhile, Andrew Wood, a BBC journalist who worked in South Korea for two years, says he was often mistaken for a US soldier while he was there.
"Taxi drivers rarely stop for white men on Friday or Saturday night as they allegedly assume white men are drunk soldiers who will vomit in the back of their cabs."
