Filming in mixed reality

Virtual reality projects are mainly aimed at those who are directly in VR glasses. Sometimes this experience is not enough, and you need to show others what is happening at the moment in the headset, or at the end of the project to shoot a video where both a person and virtual content are visible at the same time
We tested the Reality Mixer app for iOS, with which you can create videos of the VR gameplay in mixed reality without a PC and without a green screen. As a result, we got a video where you can see both a person and what surrounds him in virtual reality:
From earlier experiments, we tried a bundle of LIV and TiltBrush, as part of the Lessons of Auschwitz project: