jmvandeel

Thank you, that worked. I have added the following code to my child theme function.php:

/* Adding the video backgroun to the footer on the homepage only */
add_action('wp_footer', 'add_video_background');
function add_video_background(){
if(is_front_page()) {  
	echo do_shortcode( '[vidbg container="#post-252" mp4="Traffic_disco.mp4" webm="Traffic_disco.webm" poster="Traffic_disco.jpg" muted="true" loop="true" overlay="false" overlay_color="#000" overlay_alpha="0.1"]' );
	}
};

Only the alpha seems not to work, but thats no issue for now.