WordPress at a glance
function is not described

wp_get_media_creation_timestamp() WP 4.9.0

Parse creation date from media metadata.

The getID3 library doesn't have a standard method for getting creation dates, so the location of this data can vary based on the MIME type.

No Hooks.

Return

Int/true/false. A UNIX timestamp for the media's creation date if available or a boolean FALSE if a timestamp could not be determined.

Usage

wp_get_media_creation_timestamp( $metadata );
$metadata(array) (required)
The metadata returned by getID3::analyze().

Code of wp get media creation timestamp: wp-admin/includes/media.php WP 5.2.2

<?php
function wp_get_media_creation_timestamp( $metadata ) {
	$creation_date = false;

	if ( empty( $metadata['fileformat'] ) ) {
		return $creation_date;
	}

	switch ( $metadata['fileformat'] ) {
		case 'asf':
			if ( isset( $metadata['asf']['file_properties_object']['creation_date_unix'] ) ) {
				$creation_date = (int) $metadata['asf']['file_properties_object']['creation_date_unix'];
			}
			break;

		case 'matroska':
		case 'webm':
			if ( isset( $metadata['matroska']['comments']['creation_time']['0'] ) ) {
				$creation_date = strtotime( $metadata['matroska']['comments']['creation_time']['0'] );
			} elseif ( isset( $metadata['matroska']['info']['0']['DateUTC_unix'] ) ) {
				$creation_date = (int) $metadata['matroska']['info']['0']['DateUTC_unix'];
			}
			break;

		case 'quicktime':
		case 'mp4':
			if ( isset( $metadata['quicktime']['moov']['subatoms']['0']['creation_time_unix'] ) ) {
				$creation_date = (int) $metadata['quicktime']['moov']['subatoms']['0']['creation_time_unix'];
			}
			break;
	}

	return $creation_date;
}