Google Webmaster Tools gives me this error:
"This XML tag has an invalid value. Please fix it and resubmit."
I have to replace every occurrence of empty video ratings - "<video:rating></video:rating>" - with "<video:rating>4</video:rating>" in order to make the error message go away.
I chose "4" arbitrarily. I am sure the number does not make a difference.
I find that no value in the video rating field <video:rating></video:rating> is the source of the problem.
Is this a plug-in problem or a GWT problem?