If you just bought a new camera, there are a handful of settings you'll want to check and adjust right out of the box.
Canon’s EOS R6 Mark III combines powerful stills and advanced filmmaking functions for photo enthusiasts in a weather-resistant camera body with lots of customisable controls.
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 ...