translation.en: So now this LED lamp here is streaming a video by changing the brightness of the LED in a very subtle way, and in a way that you can't recognize with your eye, because the changes are too fast to recognize.
translation.zh: 所以现在这个LED灯正在通过亮度的细微变化传导一个视频 这种亮度变化太快，不能用肉眼识别