Trigger Popup Happens Only the 1st time when the content is an iFrame

Hi there, I’m experiencing an issue where i’ve created a button to trigger a popup that contains an iframe.

When I click the blue “WATCH VIDEO” button on my page, it works and loads the 1st time. However, if I close it and click the button again, the screen dims as if it’s loading the popup again but the actual popup doesn’t show.

If I refresh the page, then it corrects itself but only for the 1st time.

Any idea why it’s not working for iframes? It works if the content is plain text or other HTML besides an iFrame.

Thanks!

The page I need help with: [log in to see the link]