Repository: yt-dlp/yt-dlp
File: yt_dlp/extractor/rule34video.py (Python)

Code before:
                'thumbnail': 'https://rule34video.com/contents/videos_screenshots/3065000/3065296/preview.jpg',
                'duration': 938.0,
                'age_limit': 18,
                'tags': 'count:50'
            }
        },
    ]

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

        formats = []

        for mobj in re.finditer(r'<a[^>]+href="(?P<video_url>[^"]+download=true[^"]+)".*>(?P<ext>[^\s]+) (?P<quality>[^<]+)p</a>', webpage):
            url, ext, quality = mobj.groups()
            formats.append({
                'url': url,
                'ext': ext.lower(),
                'quality': quality,
            })

        title = self._html_extract_title(webpage)
        thumbnail = self._html_search_regex(r'preview_url:\s+\'([^\']+)\'', webpage, 'thumbnail', default=None)
        duration = self._html_search_regex(r'"icon-clock"></i>\s+<span>((?:\d+:?)+)', webpage, 'duration', default=None)
        tags = re.findall(r'<a class="tag_item"\s+href="https://rule34video\.com/tags/\d+/".*>(?P<tag>.*)</a>', webpage)

        return {
            'id': video_id,
            'formats': formats,
            'title': title,
            'thumbnail': thumbnail,
            'duration': parse_duration(duration),
            'age_limit': 18,
            'tags': tags
        }


Review comment (suggestion):
```suggestion
        tags = re.findall(r'<a class="tag_item"\s+href="https://rule34video\.com/tags/\d+/"[^>]*>(?P<tag>[^>]*)</a>', webpage)
```

Also, do we really need to check the URL? Isn't the class enough?

```py
            'tags': re.findall(r'<a class="tag_item"[^>]*>(?P<tag>[^>]*)</a>', webpage)
```

Code after:
                'thumbnail': 'https://rule34video.com/contents/videos_screenshots/3065000/3065296/preview.jpg',
                'duration': 938.0,
                'age_limit': 18,
                'tags': 'count:50'
            }
        },
    ]

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

        formats = []

        for mobj in re.finditer(r'<a[^>]+href="(?P<video_url>[^"]+download=true[^"]+)".*>(?P<ext>[^\s]+) (?P<quality>[^<]+)p</a>', webpage):
            url, ext, quality = mobj.groups()
            formats.append({
                'url': url,
                'ext': ext.lower(),
                'quality': quality,
            })

        title = self._html_extract_title(webpage)
        thumbnail = self._html_search_regex(r'preview_url:\s+\'([^\']+)\'', webpage, 'thumbnail', default=None)
        duration = self._html_search_regex(r'"icon-clock"></i>\s+<span>((?:\d+:?)+)', webpage, 'duration', default=None)

        return {
            'id': video_id,
            'formats': formats,
            'title': title,
            'thumbnail': thumbnail,
            'duration': parse_duration(duration),
            'age_limit': 18,
            'tags': list(map(unescapeHTML, re.findall(
                r'<a class="tag_item"[^>]+\bhref="https://rule34video\.com/tags/\d+/"[^>]*>(?P<tag>[^>]*)</a>', webpage))),
        }