@ArneBab Sabine posted a comment on the YT video, but that seems to have been deleted. In the meantime she does offer comment on her channel:
https://www.youtube.com/watch?v=HQVF0Yu7X24
Also, Sabine is not a "lone knight". As an example I'd like to point to Peter Woits latest blog post:
https://www.math.columbia.edu/~woit/wordpress/?p=14214
It may also be instructive to recall the "Wormhole Quantum Computer" publicity stunt which happened only recently.
I think my attention is still spent better on Sabine than on "Prof Dave".
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