HMD maker eMagin is introducing a single eye HMD for the Apple iPod Video dubbed EyeBud 800.

Apparently this iPod Head mounted display is generating a virtual 105-inch display from 12 feet away.
To get video signal out of the iPod video you would need the Apple iPod Universal Dock. Emagin must have access to the data protocol to rebuild the dock to get video into their HMD. As the photo shows their is an iPod-sized unit that also contains the battery that is part of the wearable video system.
The eMagin EyeBud is expected to retail for a hefty $599.
More details and larger photo on the Seattle PI.

The eMagin Z800 3DVisor HMD is available on the market.