I've just downloaded and installed the Video SEO Plugin - great work, great idea.
After pressing Re-Index, the plugin crawled 781 pages and found plenty of <object> embedded videos from YouTube. I then added a fresh one using the same method.
However, when I checked the Video XML it was completely blank.
Couple of links to help show what I mean ..
Example of old video
Example of new post with video to test
Thanks in advance for any help you can give. Much appreciated.