The problem just seems to be that the element with the class "carousel-control right" inside your video player is over top of your payment element. The easiest way for you to fix this would be probably for you to change the CSS of the the 'carousel-control' elements to include this:
This will make the carousels 1/3rd of the size of the player and vertically centered (approximately). If you don't want to do that, you would probably have to fiddle with how the elements are placed on the page, since changing the z-index within didn't work (the payment element is within the player iframe, whereas the 'carousel-control' elements are outside).
There are a lot more problems with your website (The general layout of the buttons is sloppy,
the site is not responsive to phone or tablet resolutions).