Shotcode to create custom url from ACF fields and post id

functions.php

/**
 * Returns a custom url based on the post id, title and a unique ACF field value then loops through
 * the resulting string of id's returned by "this" post's ACF field, querying and returning yet another ACF
 * field from each looped post id.
 **/
add_shortcode( 'url_from_acf', 'my_url_from_acf' );
function my_url_from_acf(){
    $post_id = get_the_ID();
    
    if ( get_post_type( $post_id ) === 'my_cpt' ) {
        $my_title = get_the_title( $post_id );
        $my_post_ids_string = get_field( 'acf_field_with_post_ids' );

        $my_post_ids = explode(',', $my_post_ids_string);
        $my_post_ids_array = [];
        
        foreach( $my_post_ids as $url_post_id ){
            $my_url_path = get_field( 's3_video_file_path', $url_post_id, false );
            array_push( $my_post_ids_array, $my_url_path );
        }

        $playlist_filelist = implode(',', $my_post_ids_array );
        
        $url = 'https://mysite.com/?my_title='. urlencode($my_title) .'&my_post_ids_playlist='. $playlist_filelist .'#my_scroll_to_achor';
        return $url;
    }
}

V2 updated to show additional loop based on current cpt post's ACF field containing a string of other post IDs.