youtube_playlist-8.x-1.x-dev/youtube_playlist.links.menu.yml

entity.youtube_playlist.settings:
  title: 'Youtube playlist'
  description: 'Configure a Youtube playlist entity type.'
  route_name:  entity.youtube_playlist.settings
  parent: system.admin_structure
entity.youtube_playlist.collection:
  title: 'Youtube playlists'
  description: 'List of youtube playlists.'
  route_name: entity.youtube_playlist.collection
  parent: system.admin_content