I think that was a special live for Twice 5th anniversary (it was so fun), before the live they asked fans in Insta to post some photos/videos that made them a Twice fan but when they were reviewing it it was full of Meme! simply once being once, but they love it (and hate it in the same time LOL) , they know their fandom !
It was the TWICE 5th Anniversary live and they went through IG,Twitter watching fan edits and stuff, btw onces were given a hashtag to post edits and memes for the 5th anniversary and they went through that hashtag
Here is the link to their YT channel for their 5th Anniversary special. You can skip to 2:55, enjoy! Love your reactions ♥️ ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EQrwydJDdkM.html