Those science-fic nutheads of "Brian in a vat" had a finally a work to prove themselves by a cinematic work.
Camera traveling across the spaces to spaces the times to times, we seemingly got in to a nest world like those science-fic boys passionate about. Though it can only be achieved through the film-a lie.
You can't assume that there is an outer space, or there would be infinite ones of nest. Basically this idea is mainly seeking for a host to conquer on his failure of competitive world he is now living in.
Back to film. It's super cool that finally filmmaker showed the existence of camera, the liar showed himself up.