VR video formats, realizations and devices (Patreon)

I'm already rendering a VR stomach animated scene, and, as long as this is my very first deal with VR stuff, I'm searching for the ways how to make VR video simulations comfort for viewing and experiencing. Here's a quick poll for me to understand the situation around:) So just tell me what type of VR-vory content you find more comfort/possible to use.