media_entity_file_redirect-8.x-1.0-beta1/media_entity_file_redirect.routing.yml

media_entity_file_redirect.file_redirect:
  path: '/document/{media}'
  defaults:
    _controller: '\Drupal\media_entity_file_redirect\Controller\MediaEntityFileRedirectController::redirectToFile'
  requirements:
    _entity_access: media.view
    media: \d+