Usually you live with your host and are expected to join in and cooperate with the day to day activities. In most countries the exchange is based on 4-6 hours help-fair exchange for a full day’s food and accommodation...
Error type: "Forbidden". Error message: "Method doesn't allow unregistered callers (callers without established identity). Please use API Key or other form of API consumer identity to call this API." Domain: "global". Reason: "forbidden".
Did you added your own Google API key? Look at the help.
Check in YouTube if the id youtube belongs to a username. Check the FAQ of the plugin or send error messages to support.