Just finished catching up, what a journey! I was still tearing up at the results, having never watched the show before but knowing full well who made the final lineup. I wasn't really familiar with Sohye at all, so seeing her progression in the show was insane. I definitely think it's worth checking out their discography since they only have 2 mini albums and some singles. I'm cool with IOI reactions getting posted to YouTube, whether time delayed or not.
Here's a fairly recent Reddit thread about where all the members are at nowadays if you're interested: https://old.reddit.com/r/kpop/comments/1d61rhg/where_are_they_now_8_years_later_produce_101/
and a few IOI video suggestions that could be fun to react to after checking their discography:
'I.O.I Evolution: Where Are They Now?' This video shows 5 second snippets of all MVs released chronologically by the members of IOI to include IOI MVs, MVs from the groups that the members of IOI joined (PRISTIN, Gugudan, Weki Meki, WJSN, etc.) or MVs from the members that had solo releases (Somi, Chungha, Sejeong, etc.). Definitely would contain music spoilers for the ones you've had on Shallow Dive polls like WJSN and Chungha, but you might be alright with the goldfish memory anyway 🤣: https://www.youtube.com/watch?v=y6OMyOZ5sdA (~10min. long)
IOI's debut showcase which has English subs on 1theK channel: https://www.youtube.com/watch?v=zMxYhXbb3jc (~1hr.15min. long)
I.O.I 5th debut anniversary reunion live broadcast 'I.5.I - Yes, I Love It!' is their 5th anniversary reunion and has English subs, Kang Mina and Pinky were unfortunately absent due to scheduling conflicts: https://www.youtube.com/watch?v=UTLfoeg9umY (~1hr.45min.)
IOI on Weekly Idol (EP 266): https://www.youtube.com/watch?v=FAo-7wrbTB0 (~1hr. long)
'TWICE, Red Velvet, GFRIEND, I.O.I - Girl's Present' This is all of them performing SNSD's 'Into The New World' on stage together as one massive amalgamation of Girl Group perfection at the 2016 KBS Song Festival: https://www.youtube.com/watch?v=-P3rZOmau-g (~5min. long)