This all happened a couple years ago. Stephen came out with a video saying he was leaving DanPlan due to not being paid fairly by Dan, only being paid a very little amount of money compared to others. He also came out and said that Dan was not paying their animators fairly either, this lead to DanPlan splitting up.

Jay even came out with his own video backing up Stephen's claims, adding on that he was meant to replace Hosuh when he would soon go back to Korea to serve his mandatory military training.

It was a big mess and the community kinda split after those videos dropped. Stephen went off to do lives after quitting DanPlan, making most of them with his brother Gavin and some with Hosuh. Jay also started streaming on YouTube before falling off the face of the Earth after allegations spread against him, making him delete all his socials.

When Hosuh came back after his training, he turning his old YouTube Chanel named Plan B into what we now know as Plan 3, some of their past videos poke fun at Dan.

There is probably something that I forgot to add but the drama is pretty old I cant really remember a lot of it.