When I choose maximize the video in an article in Joomla, I see the main menu of my page at the top of the window so I think if I play the video in a new window I  will see the image without the menu of my page.
Could anybody help me to do it?
Thank you for any help and regards.
Eduardo

Seeing your menu over the fullscreen video is probably because your menu has a z-index that is higher of the player. Could you please provide a link to your video page to check it out?