Video Background - Having it to display full screen (including site's header)

For some reason, my website doesn't showcase a full video background when i select the media on the homepage.

It only affects the selected section, i want it to be affecting the header too.

This is what is happening right now:

This is what i want to achieve:

Can somebody point out the problem? As i understand squarespace 7.1 themes are all capable of doing the same in terms of styling, i watched youtubers and they just simply click on the section settings, add the video and automatically everything fits for the whole screen. I need help, it's driving me nuts... thanks in advance though.

bump

Hi. Can you share site url? We can check easier

@tuanphan hey the website url is: www.c2ny.com

and the pw is: websitevideo

thanks!!!

8 hours ago, quirze said:

@tuanphan hey the website url is: www.c2ny.com

and the pw is: websitevideo

 

thanks!!!

Hi. I don't see video. Can you add it?

Added! @tuanphan

On 6/12/2021 at 7:06 PM, quirze said:

Added! @tuanphan

Add to Design > Custom CSS > Then save & reload your site

/* Home video background */
body.homepage article section:first-child {
    padding-top: 0 !important;
}
body.homepage header#header {
    background: transparent;
}

@tuanphan Thanks! May i ask why is not doable with the common way, using the 7.1 interface?

22 hours ago, quirze said:

@tuanphan Thanks! May i ask why is not doable with the common way, using the 7.1 interface?

Edit Site Header >> Colors > Enable Transparent Header