[MichailP]

Thanks. However, there is still a possibility that mechanical vibration is coming to the video sensor through some path (floor+camera tripod), and affecting the video. After all mechanical vibration is affecting the potato chips. Why is it so impossible to affect video sensor? Especially in the sensitive high speed camera? Let the downvotes begin :)

[anigbrowl]

Well, the chip bag weighs a few grams at most. The camera and gear weigh something like 50kg. The higher the video frame rate, the greater the damping you need to prevent unwanted vibration. Notice the tests were performed with a speaker playing back inside the room rather than a person, in order to minimize mechanical vibrations. The sensors are very firmly mounted inside the camera, trust me.

[underyx]

I fail to see how that would make this any less impressive.

[MichailP]

If my evil :) speculation is true, the camera sensor is just picking up mechanical vibrations from environment (coming through air, tripod etc.) and encoding them into video. There is no proof that the bag of chips is vibrating (they even say that the vibrations are not visible on footage). They are extracting something from video, but that something may just be spuriuos pickups by equipment, and not related image/video of bag of chips. Thus it would be just a silly way to measure spurious mechanical vibrations.