I imagine you would have to make a networked game in either Unity or Unreal. These engines have built-in support for networked gaming via the Oculus Online Subsytsem. You would have to build a game where players entered a shared level and events were triggered on all client devices at the same time.
Hey Rupert I´m very interested to be included in the beta, we have 30 Oculus Go devices and want to have an audience view a 360 video simultaneous, controlled from a PC
Sorry for the delay getting back to you. We have started trialing the product now. Send me your emails and I'll add you to the beta channel: rupert.rawnsley@avantiseducation.com