We now support a fields parameter! It's undocumented at the moment, and there will be more info soon, but you can mimic this in your request like this : 

`$lib->request('/videos', array('per_page' => 50, 'query' => urlencode($_GET['query']), 'fields' => 'link,name,user.name'));`

Notice dot notation for user.name. This is how you request parts of sub-objects.