entity_embed.routing.yml

entity_embed.dialog:
  path: '/entity-embed/dialog/{editor}/{embed_button}'
  defaults:
    _form: '\Drupal\entity_embed\Form\EntityEmbedDialog'
    _title: 'Embed entity'
  requirements:
    _embed_button_editor_access: 'TRUE'

entity_embed.preview:
  path: '/entity-embed/preview/{filter_format}'
  defaults:
    _controller: '\Drupal\entity_embed\Controller\PreviewController::preview'
  requirements:
    _entity_access: 'filter_format.use'