This seems to have been taken Backstage at some Military concert with Shindong~
Trot Singer Hong Jin Youn’s Instagram (sambahong):
As they are all saying hello, Yunho is quiet then: what is it?
JY: vid ahaha
SD: isn’t it obviously a video?
Y: i didn’t know
[cr: Translated by @snxy]
Shin’s Family Leader ShowMan’s Instagram (showman0917):
As indicated above,
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