Hello, @Goldy,
Please watch this official video from Elementor to set the video: https://www.youtube.com/watch?v=lKPmEKSdXAo
OR
You can use the Custom HTML as well to place the video on your site: https://www.w3schools.com/html/html_youtube.asp
Our theme is compatible with the Revolution Slider plugin you can use this plugin. To install this plugin navigate to the Dashboard >> XSTORE >> Plugins Installer and then install the plugin from there. Now, to know how to set the video on background check this articles :https://www.themepunch.com/revslider-doc/main-background/ https://www.themepunch.com/faq/static-layer-background-video/
Regards 8Themes Team.
