How Do I Edit Video Recorded Using Switcher?
The main video output from the broadcast panel will be recorded locally to the device that was used as the video switcher.
To edit on your computer, transfer the video to your device's Camera Roll using the "Recorded Media" menu, which is found in the upper-left corner of the app.
You can also use the "Open In..." option to send the video to editing apps like iMovie. Here you can perform some basic editing directly from your device.