Filter for custom message for print or downloads

custom_text_for_sell_media_products

function my_sell_media_content_loop( $content ) {

    global $post;
    $post_id = $post->ID;

    $parent_id = sell_media_get_attachment_parent_id( $post_id );
    $post_id = ( '' === $parent_id ) ? $post_id : $parent_id;
    $meta = get_post_meta( $post_id, '_sell_media_reprints_sell', true );
    $message = '';

    if ( is_main_query() && is_singular( 'sell_media_item' ) && ! sell_media_has_multiple_attachments( $post_id ) || sell_media_attachment( $post_id ) ) {
        if ( 'reprint' == $meta ) {

            //Edit the next line with a custom message or HTML code for print products.
            //Leave only the quotes if you don't want to add a custom message.
            //For example $new_content .= '';

            $content .= '<div class="item-description">Custom text for print products</div>';
        } else {

            //Edit the next line with a custom message or HTML code for downloadable products.
            //Leave only the quotes if you don't want to add a custom message.
            //For example $new_content .= '';

            $content .= '<div class="item-description">Custom text for downloads</div>';
        }
    }

    return $content;

}
add_filter( 'the_content', 'my_sell_media_content_loop', 1 );