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

Code before:

    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):
        """
        Facebook may return a 403 with an HTML page containing a JS snippet that:
        1. Fetches a /__rd_verify_... endpoint with POST
        2. That endpoint sets an rd_challenge cookie
        3. The original request with that cookie succeeds

        We need to mimic this for us to see the true webpage

        See https://github.com/yt-dlp/yt-dlp/issues/15577 for details
        """

        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)

        # we've hit a 403 with a client challenge, we need to solve it
        self.write_debug('Found facebook ads JS challenge')

        challenge_path = self._search_regex(
            r'''fetch\s*\(\s*['"](\/__rd_verify[^'"]+)['"]''',
            error_page,
            'challenge path',
            default=None,
        )
        if not challenge_path:
            raise ExtractorError(
                'Unable to extract rd_challenge.',
                expected=True,

Review comment (suggestion):
IMO this is enough here
```suggestion
        # See https://github.com/yt-dlp/yt-dlp/issues/15577
```

Code after:
    }, {
        'url': 'https://www.facebook.com/ads/library/?id=874812092000430',
        'info_dict': {
            'id': '874812092000430',
            'title': 'TikTok',
            'uploader': 'Case \u00e0 Chocs',
            'uploader_id': '112960472096793',
            'uploader_url': 'https://www.facebook.com/Caseachocs/',
            'timestamp': 1768498293,
            'upload_date': '20260115',
            'like_count': int,
            '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)