Tried with default theme:
Tried with all other plugins disabled:
I am getting the same Google Seo Errors from teh structure data.
I would like to add the following two observations
1) For some of the thumbnails I have been using your tools auto thumbnail feature. Which means the thumbnail is being populated by the tool. (a) It would be nice for the tool to include that link for the seo. Since I use the tool to lazy load You tube videos, it would be nice to be able to put in that occassionally as an external link to the image from other sites . Right now the tool only allows auto select or you must select an image from the media library, it doesn’t give me the option to put an external link to the seo field which would be handy for the external videos. Right now you are using that field twice, once to populate the image on the page and once to populate the seo field in the rich snippet xml. You may have to have two fields so A person can provide an external link for seo, but an internal link for the site to show for performance purposes.
Does that make sense?
2) The description field is more important now with rich snippets, a text area for input over a text line for input might be more useful for editing purposes.
You mean in the Shortcode UI dialog for classic editor? You can add a url to the thumbnail attribute of the shortcode do you know that?
The thumbnail was already added, ARVE has a fallback thumbnail option so you should use that for cases where the thumbnail can not be obtained for some videos. I just released update that adds description and title with fallbacks.