How to connect multiple computers to one TV?

Question

Monitors

Hello,
There is the following task: there are four computers (not the most modern, no HDMI outputs, no Wi-Fi). To demonstrate sketches to clients, we want to hang one large TV (modern), and broadcast an image from each computer. Those. one employee showed his sketches, disconnected, the second one joined. Naturally, without unnecessary twitching of wires and other things.
What is the best way to do this? To ensure continuity, we prefer wired technologies.

Answer 1

KVM. Not the one that Kernel Virtual Machine, but the one that Keyboard, Mouse, Video.