It seems to be broken in your demo too.
Have you removed parallax video from the theme? We bought it based on the claim that it was supported, it’s key to our site design that we have a parallax video background.
I hope you are well today and thank you for your question.
You can use Parallax video by setting it as a background to unyson section element as shown in the attached screenshots.
Thank you for notifying us about demo site issue. We’ll fix it.