Show video in the homepage background

Browser mode and document mode need to be IE9 and IE9 Standards mode for <video> to work. Video should MPEG-4, and some times size matters.

Can you please explain more detailed based on the video embed and tags present on my homepage?  I'm playing mp4 video indeed

What do you mean with browser/document mode?

Thank you

Can you please explain more detailed based on the video embed and tags present on my homepage?

You didn't shared details of tags present on you homepage.

2. Press F12, developer tool will open up for browser and in Emulation you will find these options

<div id="videotag">
				<video autoplay="" loop="" muted="" poster="/es/../images/header.jpg" id="video-bg"> 
					<!--<source src="/es/video.webm" type="video/webm"> -->
					<source src="https://s3-eu-west-1.amazonaws.com/dow/video-entrada-2.mp4" type="video/mp4"> 
				</video>
</div>

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@media (max-width: 2300px) and (min-width: 1280px)
#video-bg {
    visibility: visible;
    width: 105%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
}
audio, canvas, video {
    display: inline-block;
}
user agent stylesheetvideo {
    object-fit: contain;
}

Video tag and video format is not the problem.

I just test it and video is being showing properly:

http://www.nacsport.com/es/testvideo.php


The problem seems to be around the CSS rules

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