Or, in this case, we pointed our camera at a hanging curtain, and you can't even see any motion in this video, but by recording a two-minute-long video, natural air currents in this room created enough subtle, imperceptible motions and vibrations that we
O, en este caso, apuntamos la cámara a una cortina, y ni siquiera se puede ver movimiento en el video, sino por la grabación de dos minutos de video, de corrientes de aire naturales