If you run into issues when trying to start a native YouTube destination within Switchboard Cloud you can try resetting your YouTube Stream Now key to see if this resolves the issue.
Please follow the steps below to do so:
Make sure you have stopped streaming to the YouTube destination in Switchboard Cloud.
While logged into the appropriate YouTube channel go to the following URL:
YouTube Control Room will open.
Scroll to the Stream Settings Section, located below the YouTube preview monitor.
Then click the Reset button to reset the stream key.
Return the Switchboard Dashboard and re-authorize the destination.
Press the blue info button to open the destination info panel.
Open the Authorization tab. Press the Authorization button and follow the prompts.
Now try starting the YouTube destination within Switchboard Cloud.