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Background Video issue in Home page

I have a background video on my home page. It works fine when we entre the site. However, if navigate to other tabs in the menu and return back to the home page the background video doesn’t show up and is frozen. Also, I can use BG video on mobile configuration? Thanks if any can help me with that, thanks.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)