The full length version of that was played all over the park, to promote the ride and hype it. A corporate video like that isn't produced for staff only. I remember vividly it was always played as the pre-show video in the old 3D Cinema. It was produced by Wordley Productions who did all of the parks promotional videos in the 90's. Here's the full version: So yes, that is the official story and series of events which made Nemesis what it is. If Sub Terra videos say otherwise, then they got it wrong.