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How does the video whiteboard work? I presume he isn't really writing backwards or is this some sort of software that handles the video and writing surface?

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https://www.lightboard.info/

I think he wears a shirt with mirrored writing so it looks correct to the viewers.

Dang cool, think I've heard or seen references to it before but never seen it. Thanks for the information and link

What impressed me most is when he pushes a button and the board physically moves up to make space

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