Repository: yt-dlp/yt-dlp
File: yt_dlp/extractor/facebook.py (Python)

Code before:
                'quality': qualities(tuple(self._FORMATS_MAP))(format_key),
            })
        return formats

    def _download_fb_webpage_and_verify(self, url, video_id):
        # See https://github.com/yt-dlp/yt-dlp/issues/15577

        try:
            return self._download_webpage(url, video_id)
        except ExtractorError as e:
            if (
                not isinstance(e.cause, HTTPError)
                or e.cause.status != 403
                or e.cause.reason != 'Client challenge'
            ):
                raise
            error_page = self._webpage_read_content(e.cause.response, url, video_id)

        self.write_debug('Received a client challenge response')

        challenge_path = self._search_regex(
            r'fetch\s*\(\s*["\'](/__rd_verify[^"\']+)["\']',
            error_page, 'challenge path')


        # Successful response will set the necessary cookie 
        self._request_webpage(
            urljoin(url, challenge_path), video_id, 'Requesting verification cookie',
            'Unable to get verification cookie', data=b'')

        return self._download_webpage(url, video_id)

    def _real_extract(self, url):
        video_id = self._match_id(url)
        webpage = self._download_fb_webpage_and_verify(url, video_id)

        post_data = traverse_obj(
            re.findall(r'data-sjs>({.*?ScheduledServerJS.*?})</script>', webpage), (..., {json.loads}))
        data = get_first(post_data, (
            'require', ..., ..., ..., '__bbox', 'require', ..., ..., ...,
            'entryPointRoot', 'otherProps', 'deeplinkAdCard', 'snapshot', {dict}))
        if not data:
            raise ExtractorError('Unable to extract ad data')

        title = data.get('title')
        if not title or title == '{{product.name}}':
            title = join_nonempty('display_format', 'page_name', delim=' by ', from_dict=data)
        markup_id = traverse_obj(data, ('body', '__m', {str}))
        markup = traverse_obj(post_data, (
            ..., 'require', ..., ..., ..., '__bbox', 'markup', lambda _, v: v[0].startswith(markup_id),
            ..., '__html', {clean_html}, {lambda x: not x.startswith('{{product.') and x}, any))

Review comment (suggestion):
my bad
```suggestion
            error_page, 'challenge path')

        # Successful response will set the necessary cookie
```

Code after:
            'description': 'md5:f02a255fcf7dce6ed40e9494cf4bc49a',
        },
        'playlist_count': 3,
    }, {
        'url': 'https://es-la.facebook.com/ads/library/?id=901230958115569',
        'only_matching': True,
    }, {
        'url': 'https://m.facebook.com/ads/library/?id=901230958115569',
        'only_matching': True,
    }]

    _FORMATS_MAP = {
        'watermarked_video_sd_url': ('sd-wmk', 'SD, watermarked'),
        'video_sd_url': ('sd', None),
        'watermarked_video_hd_url': ('hd-wmk', 'HD, watermarked'),
        'video_hd_url': ('hd', None),
    }

    def _extract_formats(self, video_dict):
        formats = []
        for format_key, format_url in traverse_obj(video_dict, (
            {dict.items}, lambda _, v: v[0] in self._FORMATS_MAP and url_or_none(v[1]),
        )):
            formats.append({
                'format_id': self._FORMATS_MAP[format_key][0],
                'format_note': self._FORMATS_MAP[format_key][1],
                'url': format_url,
                'ext': 'mp4',
                'quality': qualities(tuple(self._FORMATS_MAP))(format_key),
            })
        return formats

    def _download_fb_webpage_and_verify(self, url, video_id):
        # See https://github.com/yt-dlp/yt-dlp/issues/15577

        try:
            return self._download_webpage(url, video_id)
        except ExtractorError as e:
            if (
                not isinstance(e.cause, HTTPError)
                or e.cause.status != 403
                or e.cause.reason != 'Client challenge'
            ):
                raise
            error_page = self._webpage_read_content(e.cause.response, url, video_id)

        self.write_debug('Received a client challenge response')

        challenge_path = self._search_regex(
            r'fetch\s*\(\s*["\'](/__rd_verify[^"\']+)["\']',
            error_page, 'challenge path')