Import VR video into Vr/Ar sample

Hello,

I have received from a company a video for VR in mp4 format,

it looks like in the file attached, weirdly it is split horizontally .

I would like to be able to play it as a VR experience when I click on a virtual button on mixed reality (same principle as the Vuforia sample with the trees, you switch between VR and AR)

Could you help me on how I could intergrate that mp4 so I could have a real VR experience?

Thank you !