If you listen what he says in the video, at 1:18:48 he says "on the Thursday it will spin up and be deployed into orbit". He then proceeds to talk about how the new "contact" will appear in the completed space port, which allows you to colonize the next system.I don't recall them having said anything about 10 lightyears (or whatever distance will be settled upon) per week, but per COMPLETION.
This quite clearly and heavily implies that the space ports will only be completed on the Thursday maintenance breaks, and thus you can only advance your chain of colonized systems once per week at the fastest.