Have more than one camera plugged in (like a camcorder through a capture device)? Pick it from "Camera source" above before tapping Start — the capture device just needs to show up as a webcam to your computer, which most USB/HDMI capture devices do automatically. To livestream from this phone while scoring on another device: tap "Just follow a live match" above and pick your match — the score updates onto this overlay automatically, no pairing needed, as long as both devices are signed in. Tap ⛶ Fullscreen to fill the screen — you can also pinch with two fingers on the video to zoom in/out. Tap 📡 Go live so others can watch this camera from the "Watch live" tab. Tap ▶ Stream to YouTube to broadcast via your own relay server (you'll be asked for its address and your YouTube stream key once — tap here to clear those saved details). "🔗 Pair devices" is an older, alternate way to link two devices directly — you shouldn't need it for the above.