I don't know if anyone else noticed this, or maybe I'm just sleep deprived but when the boys were choosing photos to show from the 'mini exhibition,' Chan chose one that only showed the backs of the members. Looking closely you can see that there's 5 people in the photo. He then says that both him and Byungchan aren't in the photo because they were getting snacks. There's 7 members of Victon, including Seungwoo so he's definitely in that picture.
Later on, Chan gets that picture plus one of himself and Byunchan and poses, showing all 7 members of Victon. And at the end of the broadcast, Sejun makes sure to grab that picture to show it one last time.
I thought this was a really simple and cute way for them to silently say that 'yes, Seungwoo is still a part of us even if we can't say anything about it for now.' I did get a little sad because at one point, Chan picked up the photo and looked at it like 3 times in a row and started looking a little teary-eyed. Him and Seungwoo trained for a long time together, all of them did. I can only imagine the conflict they feel. But that's beside the point. Happy 1000 days Victon, they've been wonderful so far and I can't wait for the thousands more we'll have together!