Getting all posts of certain post type excluding parents

I have been searching for a way to loop through a post type and only show the children posts and so far I have not found a way.

I can use this loop

query_posts( array(‘post_type’ => ‘video’,’paged’ => $paged, ‘post_parent’ => 0, ‘post_status’ =>’public’,’order’ => ‘asc’, ‘orderby’ => ‘date’ ) );

which would give me only the parents but I need to do the other way around. I need to get all the children belonging to all the parents in that post type.