I think context matters; that specific video is meant to show a summary of the functionality; it's in a section called "ereader on steroids" and it doesn't say anything about speed. And there are a lot of other videos on the same page which are not sped up. https://daylightco.gorgias.help/en-US#article-493382

Labelling the speed would be nice, but I don't detect any bad intentions here.