[extractor/generic:quoted-html] Add extractor (#5213)

Extracts embeds from escaped HTML within `data-html` attribute.
Related: https://github.com/ytdl-org/youtube-dl/issues/21294, https://github.com/yt-dlp/yt-dlp/pull/5121

Authored by: coletdjnz
Co-authored-by: pukkandan <pukkandan.ytdlp@gmail.com>

yt_dlp/extractor/genericembeds.py

@@ -1,5 +1,8 @@
+import re
+import urllib.parse
+
 from .common import InfoExtractor
-from ..utils import make_archive_id
+from ..utils import make_archive_id, unescapeHTML
 
 
 class HTML5MediaEmbedIE(InfoExtractor):
@@ -29,3 +32,84 @@ class HTML5MediaEmbedIE(InfoExtractor):
             })
             self._sort_formats(entry['formats'])
             yield entry
+
+
+class QuotedHTMLIE(InfoExtractor):
+    """For common cases of quoted/escaped html parts in the webpage"""
+    _VALID_URL = False
+    IE_NAME = 'generic:quoted-html'
+    IE_DESC = False  # Do not list
+    _WEBPAGE_TESTS = [{
+        # 2 YouTube embeds in data-html
+        'url': 'https://24tv.ua/bronetransporteri-ozbroyenni-zsu-shho-vidomo-pro-bronovik-wolfhound_n2167966',
+        'info_dict': {
+            'id': 'bronetransporteri-ozbroyenni-zsu-shho-vidomo-pro-bronovik-wolfhound_n2167966',
+            'title': 'Броньовик Wolfhound: гігант, який допомагає ЗСУ знищувати окупантів на фронті',
+            'thumbnail': r're:^https?://.*\.jpe?g',
+            'timestamp': float,
+            'upload_date': str,
+            'description': 'md5:6816e1e5a65304bd7898e4c7eb1b26f7',
+            'age_limit': 0,
+        },
+        'playlist_count': 2
+    }, {
+        # Generic iframe embed of TV24UAPlayerIE within data-html
+        'url': 'https://24tv.ua/harkivyani-zgaduyut-misto-do-viyni-shhemlive-video_n1887584',
+        'info_dict': {
+            'id': '1887584',
+            'ext': 'mp4',
+            'title': 'Харків\'яни згадують місто до війни: щемливе відео',
+            'thumbnail': r're:^https?://.*\.jpe?g',
+        },
+        'params': {'skip_download': True}
+    }, {
+        # YouTube embeds on Squarespace (data-html): https://github.com/ytdl-org/youtube-dl/issues/21294
+        'url': 'https://www.harvardballetcompany.org/past-productions',
+        'info_dict': {
+            'id': 'past-productions',
+            'title': 'Productions — Harvard Ballet Company',
+            'age_limit': 0,
+            'description': 'Past Productions',
+        },
+        'playlist_mincount': 26
+    }, {
+        # Squarespace video embed, 2019-08-28, data-html
+        'url': 'http://ootboxford.com',
+        'info_dict': {
+            'id': 'Tc7b_JGdZfw',
+            'title': 'Out of the Blue, at Childish Things 10',
+            'ext': 'mp4',
+            'description': 'md5:a83d0026666cf5ee970f8bd1cfd69c7f',
+            'uploader_id': 'helendouglashouse',
+            'uploader': 'Helen & Douglas House',
+            'upload_date': '20140328',
+            'availability': 'public',
+            'view_count': int,
+            'channel': 'Helen & Douglas House',
+            'comment_count': int,
+            'uploader_url': 'http://www.youtube.com/user/helendouglashouse',
+            'duration': 253,
+            'channel_url': 'https://www.youtube.com/channel/UCTChGezrZVmlYlpMlkmulPA',
+            'playable_in_embed': True,
+            'age_limit': 0,
+            'channel_follower_count': int,
+            'channel_id': 'UCTChGezrZVmlYlpMlkmulPA',
+            'tags': 'count:6',
+            'categories': ['Nonprofits & Activism'],
+            'like_count': int,
+            'thumbnail': 'https://i.ytimg.com/vi/Tc7b_JGdZfw/hqdefault.jpg',
+        },
+        'params': {
+            'skip_download': True,
+        },
+    }]
+
+    def _extract_from_webpage(self, url, webpage):
+        combined = ''
+        for _, html in re.findall(r'(?s)\bdata-html=(["\'])((?:(?!\1).)+)\1', webpage):
+            # unescapeHTML can handle " etc., unquote can handle percent encoding
+            unquoted_html = unescapeHTML(urllib.parse.unquote(html))
+            if unquoted_html != html:
+                combined += unquoted_html
+        if combined:
+            yield from self._extract_generic_embeds(url, combined)