Was there supposed to be a video in the empty rectangle shown after the probe launch?
Ah, yep. There was meant to be a video and I think the downloadable version of the game still has it working. The method I used for hosting the video online seems to not be functioning anymore.
If it's any consolation - the video was something I made in about 10 minutes the day before I submitted this as an assessment - it showed a very crudely drawn earth through the portal. I can't remember what that means story-wise, but past me must have thought it very important to end on!