In the video in content topic, you wrote:
We have also set the watermark image and detected no problem concerning it.
In your link:
www.[YOUR DOMAIN].com/?option=com_content&id=73
there I have added the shortcode {loadspidervideoplayer playlist=3 theme=9}, theme 9 having a watermark and watermark is well displayed (bottom right).
I also have the same {loadspidervideoplayer playlist=3 theme=9} in:
www.[YOUR DOMAIN].com/?option=com_content&id=72 and it works fine.
But if I access to that same article via the menu 'Dernières Nouvelles' and there in the news 'ERSA au Truck Show 2012' click the 'read more' to see the complete article, the watermark is not displayed.
Now if there is an existing menu item published directly to that article, all works fine (To test the difference, publish 'Test Web-Dorado News' in 'Spider' menu. Don't forget to clear the cache)
Probably a Joomla (SEF?) issue. To become crazy