How to Set Video Width on Mobile Devices

If you want to control the width of embedded videos on mobile, you can add this snippet to your theme’s functions.php file (either the main theme or a child theme):

add_action( 'after_setup_theme', function () {
    if ( wp_is_mobile() ) {
        $GLOBALS['content_width'] = 348;
    }
} );

This code sets a custom content width for mobile devices, helping ensure your embedded videos scale correctly on smaller screens.