I am trying to host a 360 video, in VR (cardboard), full screen

I have a cardboard VR headset, and my aim is that someone with one can go to my page and stick their cardboard VR on and watch my 360 video.

I want the VR view to be default.

I have been to https://developers.google.com/cardboard/vrview and spent hours trying to get the examples to work. I've tried on multiple browsers with no luck. I think the examples are broken, so I've no way to make them work.

If anything, they just create a black iFrame.

Some examples produce an unusable 'play' bar with only a play button.

Is anyone aware of the instructions/correct code to be able to host this project with all the VR code also hosted (to avoid iOS issues) in the same place?

I do have hosting and a equirectangular 360 video.

Thank you so, so much. I have been banging my head against a wall for hours and hours!!

— Jonothan.