The law which took effect on April 1 requires a users of all sites with more than 100,000 unique visitors per day to provide identification such as real names and national ID numbers.
Youtube, however, believes anonymity is important.
We have a bias in favor of freedom of expression and are committed to openness, said Lucinda Barlow, a spokeswoman for YouTube in Asia told PC World. It's very important that if users want to be anonymous that they have that chance.
Youtube user of its Korean site can still watch and browse videos on the site read comments as they always have, and will be able to embed the videos to other sites.