Scam.
Acoustic Noise cancellation works only in a small receiving area - essentially a point source receiver. A head phone can have noise cancellation. A helmet will be a lot harder, but doable. A small box would be even harder requiring multiple receivers and speakers, and yet doing at best a partial job.
The reason is you hear sound as a composite from multiple sources, including reflections. As your ears get repositioned by head movement or walking the sound changes. If your ears are covered with headphones the sound is two point sources and a few mics positioned in the room can capture ambient sound, add them together and produce the same sound 180^o out of phase with the ambient sound in the head phone essentially cancelling out the ambient. HOWEVER the system has to know the position of your ears to determine the amplitude that is reaching you, else you will hear the difference of the ambient and the phase shifted signal i.e. poor or even worse noise.
This video is a total scam.
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