Brings back memories from the early 70s when I worked at a UHF TV station that had a RCA video switcher based on relay logic. This switcher had two main busses: Program and PV (PreView). The Program buss selected the video and audio source that was actually on the air. And the PV buss allowed the operator to pre-select the next source to air.
When a button labeled "Take" was pressed or a fader handle was moved from up to down or vice-versa, the source on the PV buss was instantly selected or faded to on the Program buss. And then there was a relay "dance". This relay "dance" took the source that was previously selected on the Program buss and transferred it to the PV buss. This allowed two alternate sources to be selected, one after the other, with no additional selections to be made by the operator. So two cameras could be alternated as often as desired by just repeatedly pressing the "Take" button or using the fader. When you added the selection of an audio source, additional busses of relays became involved. And the whole thing took around a second or less. And here's the cool thing: the sounds of the rather large relays could be clearly heard around the entire room where they were housed. Kind of a click - ka-click - ka-ticketee click - click sound. Relay logic at it's very best.
Just like the use of a GVG video switcher in Star Wars as the planet destroyer, if I had been asked to do something like that back in the day, that RCA video switcher, with it's great relay dance, would have been my first choice. And the viewers would now associate the sounds of that relay "dance" with planetary destruction.