Aw, come on guys. Not everyone has the same resources or skills as a lot of the people on this board. For what it is - a low budget, fan-made short, it's pretty awesome regardless of the accuracy of the props.
While an appearance by GLaDOS would have been great, I don't think the human guards were to bad. Aperture had live personnel at some point, right? Who's to say this test subject is Chell? Could perhaps be an earlier "volunteer." If this short took place before the events of the game, that might also explain the portal device's "alternate" design, come to think of it.
Then again, there's no rule saying a movie (or a short for that matter) has to follow the game exactly.