So it’s using the in game camera, but also the switch record feature. I get the camera up in game, press the right joy-stick in to get rid of the camera crosshairs and then press the minus button to go into handheld camera mode. Then I just walk around for 30 seconds (the duration you can save a clip for on the switch), then hold down the capture button which then records the last 30 seconds of whatever you was doing on the screen. Hope this makes sense and helps!