I would think it never will it looks like they are filming the action of the gimbaled camera, probably a one off prototype. Looks like a curved bar slotted at both ends to accept the standard GoPro mounts...
It would be interesting to use the internal electronic of the Inspire1 and connect a GoPro4 with it - may be use the same gimbal?! The moving image quality would be better?! - less artefacts in shaded areas