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To be fair videos of other people's vision is almost always jittery and nauseating – no matter if it's a VR recording or a video of an action cam stuck to the forehead.

Your eyes are very good at removing all that jittering and the jankyness of your own head movements. Not so much when the movement comes from other heads...

(Of course I don't know if the product discussed is adding _additional_ jitter of some kind)

You are already experiencing that jitter irl. Heads and eyes move around all the time, but we mostly overlook it.

> who expects to be more productive

Someone not "sitting at a desk", e.g. moving around. Better phrased: e.g. someone who wants to make more use of timeframes in which they cannot be "at the desk".