What is the orbiting technique involved for this scene [youtube]? As in title, what is the technique involved for this scene:


                
            

Scene starting from 0.43 to 0.48 secs, orbiting camera view with subjects at standstill.

My best guess is they had many cameras all taking a still shot all at once. Post processing stitch the still frames together. But the scene lasted for 5 seconds. In a 30 FPS video, we will need 150 still shots or 150 cameras!! How did they hide the cameras so well in the dark background? Not practical at all?

Hope someone can shed some light? Thank you all.
I think you partially answered your own question - the dark background actually makes it easier to hide cameras. In saying that, these days a lot of the heavy work is done by interpolation software (as @romkyns mentioned), so I wouldn't think 150 cameras would be required here.