When could we walk down the streets in Seoul such as the last winter again?

As of December 2020, it is currently during Infectious Disease Prevention in Seoul, Korea.
Therefore it has been gone the splendid night culture of Seoul.
This video shows the difference between Winter 2019 and December 2020 in Gangnam Station from Psy's Gangnam Style and in Hongdae Station that is the streets of Korean youth.