Another custom menu as main menu on certain pages

Sure, you can call different navigations base don different pages, by using conditional statements https://codex.www.ads-software.com/Conditional_Tags .

So lets say I have a page called Photos and Videos and wanted to use a custom menu called Media

Where would I input this code (If this is correct) in relation to the default main menu?

<?php
if (is_page('photos','videos')){
wp_nav_menu(array('menu'=>'media' ));
}
?>