Solved!!!
Sorry it was my fault. In my video doesn't appear the last line of the index.php (public function) so I missed to include $controller->dispatch($uri). There's no problem, dispatch isn't a phantom function, and the recived parameters are passed to it in normal way. I've seen in the solution in chapter 5, where the missing line in chapter 4 appears.
Sorry to all to make spend your time, and thank you all.
Marc