Note to Self: Do you HVEC H.265? New Language to Learn.
Updated: May 9, 2018
Since beginning this Theme project, I have had to learn a new language and alphabet in order to make any new 360° content. Do you export to HVEC H.265 or simply cut the resolution to H.264 as the VR gear can handle 4096x2048 video at 30 FPS; but there's always VP9 if you're not sure.
Was it monoscopic, side by side or top and bottom? Do you have the .exe file for Rift output? Did you manage to sync your specific Android to your Unity Project. Please refer to Github for the relevant code.