Unity - VR - and the Nexus 5X

Hi All

I have a decent phone and had a taste of VR with the Gear VR. I would VERY much like to develop a virtual environment in Unity and be able to use it using the Android OS on my Nexus 5X. It does not have to be complex at all (at first). If I could just make a field of grass with the sun shining. Then move it to my phone. And then pop my phone into a Google cardboard and just look around at my field and the sun, I would then feel that I am on board and on to something. I have been trying to gather info and finding it confusing with a lot of contradictions.

I guess, my first question is: Is this possible?

I would eventually like to make something like this video:

Thanks for any help!