Refer first to the Overview of Production Console
Ensure that the Freeway YouTube channel has a Steam scheduled, and if not, then schedule one - How To Schedule a Stream
Press the STREAM button on the top right hand corner of the production console.
This should then change the screen display to change from
to
Press the RECORD button to ensure that a copy of the service is rfecorded to the USB drive in case the internet drops out or there are issues with YouTube.
And the Adjacent screen "Stop" Window should change to a red RECORDING.