wordpress change upload directory for custom post type

add_filter('wp_handle_upload_prefilter', 'so_8519968_handle_upload_prefilter');

add_filter('wp_handle_upload', 'so_8519968_handle_upload');
function so_8519968_handle_upload_prefilter( $file )

{

    add_filter('upload_dir', 'so_8519968_custom_upload_dir');

    return $file;

}
function so_8519968_handle_upload( $fileinfo )

{

    remove_filter('upload_dir', 'so_8519968_custom_upload_dir');

    return $fileinfo;

}
function so_8519968_custom_upload_dir( $path )

{

    // Check if uploading from inside a post/page/cpt - if not, default Upload folder is used

    $use_default_dir = ( isset($_REQUEST['post_id'] ) && $_REQUEST['post_id'] == 0 ) ? true : false;

    if( !empty( $path['error'] ) || $use_default_dir )

        return $path; 
    // Check if correct post type

    $the_post_type = get_post_type( $_REQUEST['post_id'] );

    if( 'movies' != $the_post_type )

        return $path; 
    $customdir = '/' . date( 'Y/m' );
    //remove default subdir (year/month) and add custom dir INSIDE THE DEFAULT UPLOAD DIR

    $path['path']    = str_replace( $path['subdir'], '/downloads' . $customdir, $path['path']);

    $path['url']     = str_replace( $path['subdir'], '/downloads' . $customdir, $path['url']); 
    $path['subdir']  = $customdir;
    return $path;

}