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.
Clearfil Photo Core is available in either syringe or PLT. If using the syringe, express material and place it manually, like a light-cure composite. The PLT, or unidose, can be dispensed by using a composite dispensing applicator.