def METHOD_NAME(self):
    test_slug = "valid-video-url"
    factory = mock.Mock()
    chapter_loader = ChaptersLoader(
        factory,
        chapter_number=1,
        content_path=test_slug,
        base_path=self.base_path,
        structure_filename="{}.yaml".format(test_slug)
    )
    chapter_loader.load()
    self.assertEqual(
        Chapter.objects.get(slug=test_slug).video,
        "https://player.vimeo.com/video/58336187"
    )