The need: My 93 year old mother has severe dementia. Although she can wear an Oculus headset, due to her dementia there's no way she is able to actually understand or control the Oculus using either the Touch controllers or hand tracking. Even, if I take control of the touch controllers, and use casting to the TV it's still hard to take control of the quest while somebody else is wearing it. So there must be many people, who could benefit from the Oculus, but who simply aren't able to actually control it.
The Driver-Passenger model would be a special optional mode - in apps supporting it so that enabling two persons with Quest headsets to enter the app environment being linked together. The idea is for example that you have a DRIVER that basically takes charge of everything, for example a carer in a care home who knows how to use the Quest and a PASSENGER - for example my mother. The PASSENGER has for the most part a passive role once inside the VR world with maybe some limited ability for interaction depending on the nature of the app. Moving around is handled by the DRIVER.
The video explains this idea in detail along with challenges of implementation and much more.