DEFAULT_STREAM

Payload	current defaultStream setting (string) requested stream name (string) viewer host (string) output type (string) full request URL (string, may be blank for non-URL-based requests!)
Response	always
Response Action	Overrides the default stream setting (for this view) to the response value. If empty, fails loading the stream and returns an error to the viewer/user.
Stream Specific	true
When	When any user attempts to open a stream that cannot be opened (because it is either offline or not configured), allows rewriting the stream to a different one as fallback. Supports variable substitution.
Argument	null

Response: Whether a response is required or ignored. If always a response is needed to continue, if ignored the response will be ignored.

Response Action: What will happen if the trigger is given a certain response. If the response action is none then the trigger cannot directly interrupt the server flow.

Stream Specific : Whether the trigger applies only to selected streams (or all if none are chosen) or whether it always applies.

When : The timing of when the trigger activates.

Argument: If applicable, when the trigger should activate.

If you're having issues working with the trigger we recommend reading up on the Trigger introduction.