VR... Video or Realtime?

So, I’m thinking about making an on rails VR experience.
Should I use just a high res video or should I make it a realtime environment?
Also, what are some good resources (using Samsung Gear VR btw)?

If you want high resolution, you’ve really got no choice but to do it in realtime, since the video encodes the entire 360 view, whereas if running in something like a game engine, only the current view has to be rendered

it really depends on the detail. 360 video has the limitation of looking flat, but images can be rendered with much higher quality, higher poly, and even raytraced.

realtime generally feels more immersive, since head movement translates into perspective shifting. however, the computational power is immense for realtime hd sets.