Theme a specific view with Twig
Views in Drupal 8 has pretty much the same template options as in Drupal 7. If you are in doubt, what suggestions are offered, you should turn on twig debugging (settings in service.yml). You will get the suggestion output as HTML comments. Unlike in Drupal 7, Views in Drupal 8 does not have a button to see the templates files being used along with suggestions.

This might be added later as Drupal 8 is still in beta, at the time of this writing.