I'm a bit annoyed that they keep putting out videos on things that don't matter, but obviously they have been working on the engine the whole time. But he used to do videos on every bit of incremental progress which makes me fear they are indeed in scenario 2. But *maybe* they're planning some epic reveal of a working section of the engine. I'm certain they're not going to try to run a whole engine if individual parts aren't performing as required, because that would just waste time.