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.

Korean tea ceremony was called Darye, it was official ceremony to entertain Chinese envoy.
In this case, China was Ming.

国朝五礼儀 Vol5
⑥司甕院提調一人奉茶瓶、一人奉茶鍾盤、倶入立於酒亭東〈奉鍾者在西〉、提挙二人奉果盤、一人立於正使之右近北南向、一人立於副使之左近南北向〈使者雖多、副使以下果皆在於左〉、提調奉果盤立於殿下之右近南北向、
⑦提調以鍾受茶〈提調酌茶〉、跪進于殿下〈茶鍾将進、殿下起座稍前立、使者起座亦稍前立、酒礼同〉、殿下執鍾、就正使前進茶、正使受鍾、権授通事、提調又以鍾受茶、跪進于殿下、殿下執鍾、就副使前進茶、副使受鍾、殿下少退、
⑧提調又以鍾受茶、立進于正使、正使執鍾、就殿下前進茶〈提調退従酒亭後、詣酒亭西北向跪、酒礼同〉、殿下執鍾、通事以権授茶鍾、立進于正使、正使還執鍾、
⑨使者就座、殿下即座、挙茶、訖、提挙各進使者前、立受鍾、提調進殿下前、跪受鍾、倶復於茶盤以出、

Summery
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）.

Reference
Tea Ritual in Chosŏn dynasty:
Practice of Guest Ritual for Ming and Ching emissaries
SHINOHARA Hirokata

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