YouTube has many videos with the title 'MV reaction' attached to the end of it which shows people filming their initial actions to a certain video.
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A YouTube channel called 'Fine Brothers Production' uploaded a video on August 19 showing 11 teens' reactions to Psy's music video.
One of the viewers named Eric commented, "This guy is so cool. If Justin Bieber is here, this guy is up here."
The viewers could not take their eyes off the screen from the music video. The teens also were seen following the 'horse-riding' dance move and trying to sing along.
The teens were also able to figure out almost instantly that the genre of music was K-Pop.
Out of the 11 viewers, one boy named Tom commented, "I am going to check out Psy's YouTube channel. I want to know more about K-Pop."