How to use the youtube-dl.youtube_dl.utils.unescapeHTML function in youtube_dl

# article with multiple videos embedded with playlist.sxml (e.g.
        # http://www.bbc.com/sport/0/football/34475836)
        playlists = re.findall(r']+name="playlist"[^>]+value="([^"]+)"', webpage)
        playlists.extend(re.findall(r'data-media-id="([^"]+/playlist\.sxml)"', webpage))
        if playlists:
            entries = [
                self._extract_from_playlist_sxml(playlist_url, playlist_id, timestamp)
                for playlist_url in playlists]

        # news article with multiple videos embedded with data-playable
        data_playables = re.findall(r'data-playable=(["\'])({.+?})\1', webpage)
        if data_playables:
            for _, data_playable_json in data_playables:
                data_playable = self._parse_json(
                    unescapeHTML(data_playable_json), playlist_id, fatal=False)
                if not data_playable:
                    continue
                settings = data_playable.get('settings', {})
                if settings:
                    # data-playable with video vpid in settings.playlistObject.items (e.g.
                    # http://www.bbc.com/news/world-us-canada-34473351)
                    playlist_object = settings.get('playlistObject', {})
                    if playlist_object:
                        items = playlist_object.get('items')
                        if items and isinstance(items, list):
                            title = playlist_object['title']
                            description = playlist_object.get('summary')
                            duration = int_or_none(items[0].get('duration'))
                            programme_id = items[0].get('vpid')
                            formats, subtitles = self._download_media_selector(programme_id)
                            self._sort_formats(formats)

def _extract_mobile_video_formats(self, mtvn_id):
        webpage_url = self._MOBILE_TEMPLATE % mtvn_id
        req = sanitized_Request(webpage_url)
        # Otherwise we get a webpage that would execute some javascript
        req.add_header('User-Agent', 'curl/7')
        webpage = self._download_webpage(req, mtvn_id,
                                         'Downloading mobile page')
        metrics_url = unescapeHTML(self._search_regex(r'

cc_json = self._parse_json(closed_captions, video_id, fatal=False)
        subtitles = {}
        if cc_json:
            for closed_caption in cc_json:
                lang = closed_caption['lang']
                if lang not in subtitles:
                    subtitles[lang] = []
                subtitles[lang].append({
                    'url': closed_caption['url'],
                    'ext': mimetype2ext(closed_caption['content_type']),
                })

        return {
            'id': video_id,
            'display_id': display_id,
            'title': unescapeHTML(meta['title']),
            'formats': formats,
            'description': clean_html(meta['description']),
            'thumbnail': meta['thumbnail'] if meta.get('thumbnail') else self._og_search_thumbnail(webpage),
            'duration': int_or_none(meta.get('duration')),
            'subtitles': subtitles,
        }

def _og_search_property(self, prop, html, name=None, **kargs):
        if not isinstance(prop, (list, tuple)):
            prop = [prop]
        if name is None:
            name = 'OpenGraph %s' % prop[0]
        og_regexes = []
        for p in prop:
            og_regexes.extend(self._og_regexes(p))
        escaped = self._search_regex(og_regexes, html, name, flags=re.DOTALL, **kargs)
        if escaped is None:
            return None
        return unescapeHTML(escaped)

if item_type in ('TVEpisode', 'Episode'):
                    info.update({
                        'episode': unescapeHTML(e.get('name')),
                        'episode_number': int_or_none(e.get('episodeNumber')),
                        'description': unescapeHTML(e.get('description')),
                    })
                    part_of_season = e.get('partOfSeason')
                    if isinstance(part_of_season, dict) and part_of_season.get('@type') in ('TVSeason', 'Season', 'CreativeWorkSeason'):
                        info['season_number'] = int_or_none(part_of_season.get('seasonNumber'))
                    part_of_series = e.get('partOfSeries') or e.get('partOfTVSeries')
                    if isinstance(part_of_series, dict) and part_of_series.get('@type') in ('TVSeries', 'Series', 'CreativeWorkSeries'):
                        info['series'] = unescapeHTML(part_of_series.get('name'))
                elif item_type in ('Article', 'NewsArticle'):
                    info.update({
                        'timestamp': parse_iso8601(e.get('datePublished')),
                        'title': unescapeHTML(e.get('headline')),
                        'description': unescapeHTML(e.get('articleBody')),
                    })
                elif item_type == 'VideoObject':
                    extract_video_object(e)
                    continue
                video = e.get('video')
                if isinstance(video, dict) and video.get('@type') == 'VideoObject':
                    extract_video_object(video)
                break
        return dict((k, v) for k, v in info.items() if v is not None)

def _real_extract(self, url):
        topic_id, video_display_id = re.match(self._VALID_URL, url).groups()
        if video_display_id:
            webpage = self._download_webpage(url, video_display_id)
            release_url, video_id = re.search(r"_videoPlayer.play\('([^']+)'\s*,\s*'[^']+'\s*,\s*'(\d+)'\)", webpage).groups()
            release_url = unescapeHTML(release_url)

            return self.theplatform_url_result(
                release_url, video_id, {
                    'mbr': 'true',
                    'switch': 'hls',
                    'assetTypes': 'high_video_ak',
                })
        else:
            webpage = self._download_webpage(url, topic_id)
            entries = []
            for episode_item in re.findall(r']*>', webpage):
                video_attributes = extract_attributes(episode_item)
                entries.append(self.theplatform_url_result(
                    video_attributes['data-release-url'], video_attributes['data-id'], {
                        'mbr': 'true',
                        'switch': 'hls',

if not data:
            data = self._parse_json(
                self._search_regex(
                    r'\s*({.+?})\s*', info_page, 'json', default='{}'),
                video_id)
            if data:
                data = data['player']['params'][0]

        if not data:
            data = self._parse_json(
                self._search_regex(
                    r'var\s+playerParams\s*=\s*({.+?})\s*;\s*\n', info_page,
                    'player params'),
                video_id)['params'][0]

        title = unescapeHTML(data['md_title'])

        # 2 = live
        # 3 = post live (finished live)
        is_live = data.get('live') == 2
        if is_live:
            title = self._live_title(title)

        timestamp = unified_timestamp(self._html_search_regex(
            r'class=["\']mv_info_date[^>]+>([^<]+)(?:<|from)', info_page,
            'upload date', fatal=False))

        view_count = str_to_int(self._search_regex(
            r'class=["\']mv_views_count[^>]+>\s*([\d,.]+)',
            info_page, 'view count', default=None))

        formats = []