play back 360 video STEREO on GearVR

Hi,

I'm trying to make something that will play back, in Unity, a stereo 360 video for Gear VR. Before Unity added the "enable for VR" option, this was fairly straightforward as the VR Player Controller prefabs usually had two cameras, you can set one to render the "right" sphere and one to render the "left." Now that unity automatically turns your Main Camera into stereo rendering, I have no way to access each eye individually and so I'm wondering how to play back STEREO 360 video (different video playing for each eye).