Error: "signatureLocal: Signature cannot be verified". If you're getting this error you will need to update the plug-in. You may need to login to Google (owner of YouTube) also. Formerly, just logging in to Google was enough. Then it wasn't anymore for me yesterday. On the June 13th I downloaded the update for this plug-in and it worked. I was already logged into Google and I don't know if that's relevant. Good luck to you! It is a great plug-in when it's working!