Help with wp_upload_tabs()

Hello, I’m trying to get a new tab to display. But I just don’t get how it works. This is what I tried:

$wp_upload_tabs = array(__(‘Videos’), ‘upload_files’, ‘wp_upload_tab_videos’, 0);
$wp_upload_tabs = array_merge($wp_upload_tabs, apply_filters( ‘wp_upload_tabs’, array() ));

Doesn’t do anything, not even an error. Please help