How the “Be.” battery-free toothbrush faked a demonstration video

I'd love to crawl inside the vendor's brain for a few minutes, get some questions answered. Like, did you think no one would notice? No? You vastly underestimate the cumulative free time available on the Internet. Regardless, why actively lie? Buying time, or you know there's no way this will ever work, so you're just figuring out your exit? And lastly, though I am no physicist or mechanical engineer, but some quick napkin math says there's no way to make two twists of a human hand turn into 2 minutes of tooth brushing. Are you incapable of the most basic up-front research and design, or did you intend to be dishonest from the start?

I mean, seriously, there is a mindset there that is so foreign to mine that I can't even comprehend what it might look like.

I enjoy watching thunderfoot's debunking videos on similar 'fake' tech, like the self-filling water bottle campaign, solar effin roadways, and of course hyperloop.

I'd be surprised if the engineers working on this project approved the release of this video, even as a fake for the working product. Anyone who has worked with electric motors can hear the device losing power and then getting a 'second wind' multiple times. I replayed the video the first time I saw it myself thinking that doesn't sound right.