* They collected extra data along this particular route.
* They made multiple test runs and picked the best.
Contrary to the spirit of the demo video and their advertising, but within "not technically lying".
This is pretty normal in marketing demos. For example, in the original iPhone presentation: The engineers identified a “golden path,” a specific set of demo actions that Jobs could perform in a specific order that afforded them the best chance of the phone making it through the presentation without a glitch. For example, Jobs could send an email and then surf the web, but if he reversed the order, the phone tended to crash. https://www.internethistorypodcast.com/2017/01/the-history-o...
If it weren't for the "and then when they released the product people thought it could do the things but it couldn't, and died" we might be looking back on this as a "clever marketing hack".