Developers creating content for Google's Cardboard virtual-reality system should look to short online videos for inspiration and avoid drawn-out experiences.

Content for Cardboard should be "snackable virtual reality," said Jon Wiley, the product's principal designer, during the I/O developer conference on Friday.

"For Cardboard, you want [an experience] to be more like traditional YouTube content," he said, adding that Google's VR platform isn't really designed for "long duration experiences."

Google sees Cardboard as a device that friends can pass around to get a feel for what VR is all about, said Manuel Clement , a user experience designer on Google's virtual reality team. In that context, shorter content would work better.

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