Stereo (or video in other words) tehcnology works by following principle:
A bulb is the first thing in the process of making video. The bulb concstructed as following: there is 2 electrodes, vacuum and a glass with rounded shape around the both previous 2 things. In total there is 3 things in a bulb. So, 2 electrodes creating between them a 1 Hz wave, and becoming by that "a getter of the 1 Hz vibration". Vacuum serves teleport role. In a emptiness (which vacuum is), things moving immediately, like in a water. Movement in the beginning - immediately transfers to a end side.
Visible part of the reality - is "a 1 Hz vibration, which punching everything around, with the power of amount of 1 Hz, so to say". A glass automatically all the time catches on itself the 1 Hz vibration from the outer side, and transfers it through the vacuum into inside of the bulb. And the 1 Hz wave between 2 electrodes, catches the "image" which comes from the reality in this particular time and place. And after 2 electrodes got 1 Hz vibration, we having electronic version of the real 1 Hz vibration. Only thing left after it - is to digitally process this complex material. Convert 1 Hz content - to a image on the monitor, by using coding, encoding and other actions.