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There is definitely overlap in the FOV of the cameras that are adjacent to each other (GoPros in 16:9 generally have about a 120 degree field of view, though specifics depend upon which GoPro models is being used), so I assume they timesync the individual videos and use that overlap information to determine relative depths of things.

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In order to do Stereoscopy properly, you need the axes of the camera barrel to intersect having a set of cameras all radially pointed outward doesn't achieve this.

The end user never sees the raw video in this case so that's not a requirement -- they're generating lots of synthetic stereoscopic views for the user by post-processing the video and accounting for depth.

I'll be interested to see what data they're sending to the video player to provide both stereoscopy and 360-panoramic video at the same time. The methods I can think of offhand require real-time pixel-shuffling to assemble the proper view during playback but maybe they figured out something else.

I'm guessing it's planes all the way down.

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