wp_filter_pre_oembed_result( null|string $result, string $url, array $args )

function wp_filter_pre_oembed_result( $result, $url, $args ) {
	$switched_blog = false;

	if ( is_multisite() ) {
		$url_parts = wp_parse_args( wp_parse_url( $url ), array(
			'host'   => '',
			'path'   => '/',
		) );

		$qv = array( 'domain' => $url_parts['host'], 'path' => '/' );

		// In case of subdirectory configs, set the path.
		if ( ! is_subdomain_install() ) {
			$path = explode( '/', ltrim( $url_parts['path'], '/' ) );
			$path = reset( $path );

			if ( $path ) {
				$qv['path'] = get_network()->path . $path . '/';
			}
		}

		$sites = get_sites( $qv );
		$site  = reset( $sites );

		// Do not allow embeds for deleted/archived/spam sites.
		if ( ! empty( $site->deleted ) || ! empty( $site->spam ) || ! empty( $site->archived ) ) {
			return false;
		}

		if ( $site && get_current_blog_id() !== (int) $site->blog_id ) {
			switch_to_blog( $site->blog_id );
			$switched_blog = true;
		}
	}

	$post_id = url_to_postid( $url );

	/** This filter is documented in wp-includes/class-wp-oembed-controller.php */
	$post_id = apply_filters( 'oembed_request_post_id', $post_id, $url );

	if ( ! $post_id ) {
		if ( $switched_blog ) {
			restore_current_blog();
		}

		return $result;
	}

	$width = isset( $args['width'] ) ? $args['width'] : 0;

	$data = get_oembed_response_data( $post_id, $width );
	$data = _wp_oembed_get_object()->data2html( (object) $data, $url );

	if ( $switched_blog ) {
		restore_current_blog();
	}

	if ( ! $data ) {
		return $result;
	}

	return $data;
}