The reason why VSL can't present something else is simply that the whole product is not ready.
Of course this is the main reason. You could not show the full potential without the Synchron Player running and all sections ready. We are just to curious what let VSL publish their Demo-exsamples perhaps still a bit to early (we have a german proverb like that: better a bird (=later published mature Library) in my hand than a bird on my roof (=to early presented demos+Videos online) 😛
However I wonder why Paul has the Releasetime as low as 63. Increase it on 70-72 and Vadim will be satisfied with the Legato no matter if it would be live or a demo. (It was nearly always the release time setting of the user, if ever anything seemed to be "wrong" with VSL-Samples 😉).
I am happy that VSL does not publish any Library to early, we all know that Synchron Series pushes the limit again much forward, so give them the time to make it as good as possible (and dont mess around with demos and Videos which currently scarcly are able to represent the whole product.)