Small enough to fit on a keychain, Openterface KVM-GO is a tiny, open-source hardware KVM-over-USB gadget available with an ...
If your devices only support up to 4K at 60Hz, a "premium high-speed" HDMI cable (18Gbps, HDMI 2.0) is perfectly fine. Again, just avoid really old or thin cables. Early HDMI cables (HDMI 1.4 or older ...