WordPress at a glance
function is not described

WP_Widget_Media_Video::enqueue_preview_scripts() public WP 4.8.0

Enqueue preview scripts.

These scripts normally are enqueued just-in-time when a video shortcode is used. In the customizer, however, widgets can be dynamically added and rendered via selective refresh, and so it is important to unconditionally enqueue them in case a widget does get added.

{} It's a method of the class: WP_Widget_Media_Video{}

Hooks from the method
Return

null. Nothing.

Usage

$WP_Widget_Media_Video = new WP_Widget_Media_Video();
$WP_Widget_Media_Video->enqueue_preview_scripts();

Changelog

Since 4.8.0 Introduced.

Code of WP_Widget_Media_Video::enqueue_preview_scripts() WP 5.7.2

<?php
public function enqueue_preview_scripts() {
	/** This filter is documented in wp-includes/media.php */
	if ( 'mediaelement' === apply_filters( 'wp_video_shortcode_library', 'mediaelement' ) ) {
		wp_enqueue_style( 'wp-mediaelement' );
		wp_enqueue_script( 'mediaelement-vimeo' );
		wp_enqueue_script( 'wp-mediaelement' );
	}
}