木材路由

Im working on a wordpress site where I'm using the Timber starter theme (link below). I cant get the routing to work properly. When i add a route to "functions.php" and try browse to that page i get 404. Cant figure out whats wrong.

Timber starter theme: https://github.com/timber/starter-theme

My code for routing (functions.php):

Routes::map('video', function(){
    Routes::load('video.php');
});