Google glass sample video I would like to make a video showing a possible interaction with Google glass. I have worn it once and don't even have one. 

What I am thinking now is to use 
                
             an iphone 3d printed headmount attachment with gopro headmount

I want the video to be as natural as possible (that it looks like shot from a glass close to eyes)
example:

                
            

                
            

                
            

Thanks for your suggestions
There's several techniques you can use to emulate Google Glass' eyesight videos. The next best thing would probably be to buy a pair of camera (sun-)glasses. Judging by what you're trying to achieve, your best option is to buy any camera from pivothead, they all film full-HD 30fps video. Other options include the SunnyCam Glasses and the iVUE Camera Glasses. There's also the Zeal HD Goggles, but those are probably impractical in temperate environments.

Alternatives include the GoPro Hero 3 (Head-mounted camera, as you suggested), the ContourROAM2 (Waterproof) and the Braun SixZero (or any other head/helmet-mounted camera). If you're on a tight budget you might want to manufacture some sort of head-mounted camera yourself.