wp_embed_defaults( string $url = '' )
Creates default array of embed parameters.
Description
The width defaults to the content width as specified by the theme. If the theme does not specify a content width, then 500px is used.
The default height is 1.5 times the width, or 1000px, whichever is smaller.
The ’embed_defaults’ filter can be used to adjust either of these values.
Parameters
- $url
 -  
(string) (Optional) The URL that should be embedded.
Default value: ''
 
Return
(array) Indexed array of the embed width and height in pixels.
- (int) The embed width.
 - 
'1'
(int) The embed height. 
Source
File: wp-includes/embed.php
function wp_embed_defaults( $url = '' ) {
	if ( ! empty( $GLOBALS['content_width'] ) ) {
		$width = (int) $GLOBALS['content_width'];
	}
	if ( empty( $width ) ) {
		$width = 500;
	}
	$height = min( ceil( $width * 1.5 ), 1000 );
	/**
	 * Filters the default array of embed dimensions.
	 *
	 * @since 2.9.0
	 *
	 * @param int[]  $size {
	 *     Indexed array of the embed width and height in pixels.
	 *
	 *     @type int $0 The embed width.
	 *     @type int $1 The embed height.
	 * }
	 * @param string $url  The URL that should be embedded.
	 */
	return apply_filters( 'embed_defaults', compact( 'width', 'height' ), $url );
}  Changelog
| Version | Description | 
|---|---|
| 2.9.0 | Introduced. | 
    © 2003–2021 WordPress Foundation
Licensed under the GNU GPLv2+ License.
    https://developer.wordpress.org/reference/functions/wp_embed_defaults