It sounds like you're referring to some entertainment content involving KBS MC and BTS. It's not entirely clear what you're talking about, but it seems like you're anticipating an official trailer on YouTube and speculating about a possible scenario involving the accidental posting of content on BTS's official Instagram story by a BH intern.
It's common for fans to speculate and share their thoughts while waiting for official announcements or releases. If you're a fan of BTS or any other group, staying updated through official channels is the best way to get accurate information about their activities and projects. Enjoy the upcoming content and surprises!
