We create our own themes so they are essentially the same across all sites and we have the same SEO and video SEO plugins installed. However, the 1.4.3 plugin still works on the older sites but not on one we just created. The video SEO plugin requires authorization and this plugin behaves like it also needs authorization.
I logged into his support site and entered a report about this issue but no response.
In any case Joost has been good with updates and support in the past so he must be on vacation in Fiji.