I see this area has been covered before, however, I'd thought I would try and be a bit more specific so that maybe others can share etc.
The plugin seems to be working great on our site - using WP 3.2.1 - but whenever a thumbnail is clicked, the url for the video isn't fetched and won't play.
I've set up a bit of a test page which is live for anyone to see:
Forget the link at the top, it's only for reference.
Any help would be much appreciated.