function my_videos_columns($columns)
{
    $columns = array(
        "cb" => "<input type=\"checkbox\" />",
        "title" => "Title",
        "firstname" => "First Name",
        "lastname" => "Last Name",
        "titles" => "Title",
        "value" => "Value",
        "subject" => "Subject",
        "date" => "Date"
    );
    return $columns;
}

function my_custom_columns($column){
    global $post;
    switch($column){
        case "firstname":
            $custom = get_post_custom();
                echo $custom["video_firstname"][0];
            break;
        case "lastname":
            $custom = get_post_custom();
            echo $custom["video_lastname"][0];
            break;
        case "titles":
            $custom = get_post_custom();
            echo $custom["video_title"][0];
            break;
        case "value":
            // Get terms for post
            $terms = get_the_terms( $post->ID , 'Values' );

            // Loop over each item since it's an array
            foreach( $terms as $term ) {
                // Print the name method from $term which is an OBJECT
                print $term->name . '<br />';
                // Get rid of the other data stored in the object, since it's not needed
                unset($term);
            }
            break;
        case "subject":
            // Get terms for post
            $terms = get_the_terms( $post->ID , 'Subjects' );

            // Loop over each item since it's an array
            foreach( $terms as $term ) {
                // Print the name method from $term which is an OBJECT
                print $term->name . '<br />';
                // Get rid of the other data stored in the object, since it's not needed
                unset($term);
            }
            break;
    }
}