At the moment, it is only possible to close the popup by clicking on the top-right cross. It would be nice to also allow users to close the popup with a Button click. At the moment, this option is not available but it would be a great addition. This would be useful in a VSL page, if the user try to exit the page, we tell them to stick to the page with a popup and tell them to keep watching the video. So the button in the popup would say "Keep Watching Now" for instance, then the user would click on it and close the popup to watch the full video.