Stream Me If You Can
How to use
This add-on is basically a little app, but you don’t run the app itself. Once you install the add-on, “Stream fallbacks” will appear as a choice in the “Data” field of a task definition.
You can add any type of TaskBomb action to a fallback list, but only actions that play remote media streams actually undergo any testing; any other actions are just run when encountered. This allows you to tell it “try this stream, if it doesn’t work then run this action.”