There is a despute whether Korea had tea ceremony in their history.
The answer is "Yes" but the modern Korean tea ceremonies we see today are heavily influenced by Japanese culture. Especially Korean "Dado" is total fabrication, it's a copy of Japanese "Sado" Korea didn't have custom to drink Matcha.
This picture is Dado.
You see it is changing.
Typical Uriginal process just like Taekwondo or Gumdo.
In early time of Uriginalizing tea ceremony, Koreans were struggling to sophisticate it.
They even prepared toilet tissue.
This is recent Korean tea ceremony video.
The tea is not Matcha but Sencha, and her motion is quite influenced by Japanese tea ceremony.
This is old picture of Korean men drinking tea.
The little girl is Gisaeng. Noble class never take manual labor due to Confucianism.
Serving tea was servant's job.
You see big differences between above video and this picture.
It was not really "ceremony".
So what was historical Korean tea ceremony like?
Let's check historical record.
http://ninjer.blog.shinobi.jp/uriginal%20issue/uriginal%20-%20did%20tea%20ceremonUriginal : Did Tea Ceremony Exist in Korea?
Korean tea ceremony was called Darye, it was official ceremony to entertain Chinese envoy.
In this case, China was Ming.
⑥One Jejo offers tea pot, one Jejo offers tea cup. Another Jejo offers fruit bowl and stand right next to the King.
⑦Jejo pour tea, offers it to the King with his knee down. The King offers the tea to the Chinese envoy.
⑧Jejo pour tea, offers it to the Chinese envoy. The Chinese envoy offers the tea to the King.
⑨The Chinese envoy sits down the seat. Then the King sits down, they both drink tea. Jejos receive the tea cups with knees down.
And they have party with alcohol after the tea ceremony.
The tea ceremony（茶礼） was a part of the alcohol party（酒礼）.
Tea Ritual in Chosŏn dynasty:
Practice of Guest Ritual for Ming and Ching emissaries