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How to work on the Row Formats to create a horizontal band displaying a background color or image

...

Set the wished Background:

• a color,
• a gradient, 
• an image,
• an image list, a video
• a map

...

>> https://guide.websitex5.com/en/support/solutions/articles/44001697155

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But I need it as total background with in front the menu etc

(It > En)  ... you could use my exclusive invention with EXTRA code to get the background of the video in FullScreen with COVER-resize-ratio mode, with a simple copy/paste of the code in the Expert section...
... but if you are interested, you have to post the LINK of your online page, and the LINK of the online video that you want to use...
... ... if you do it I will come back here... ...

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ciao

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Here the HTML and CSS code, see

>> https://www.w3schools.com/howto/howto_css_fullscreen_video.asp

And here my test page with background video, see

>> https://findelinks.de/123test-aufklappmenue-3/

1) The page background and the backgrounds of the header and footer must be set to transparent under "2 Template > Structure of the template".

2) Insert the HTML and CSS code for the video, if it applies to all pages, under "1 Settings > Statistics and Code / Code". The CSS code should be separate from the HTML code, see screenshots below

3) The video was uploaded from the hard disk to the videos subdirectory via the FTP window of WebSiteX5, see screenshot below

----- Screenshots from the German version of WebSite X5 -----

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