+
+        presumptive_id = mobj.group('presumptive_id')
+        display_id = presumptive_id
+        if presumptive_id:
+            webpage = self._download_webpage(url, display_id)
+
+            upload_date = unified_strdate(self._search_regex(
+                r'<input type="hidden" id="air_date_[0-9]+" value="([^"]+)"',
+                webpage, 'upload date', default=None))
+
+            # tabbed frontline videos
+            tabbed_videos = re.findall(
+                r'<div[^>]+class="videotab[^"]*"[^>]+vid="(\d+)"', webpage)
+            if tabbed_videos:
+                return tabbed_videos, presumptive_id, upload_date
+
+            MEDIA_ID_REGEXES = [
+                r"div\s*:\s*'videoembed'\s*,\s*mediaid\s*:\s*'(\d+)'",  # frontline video embed
+                r'class="coveplayerid">([^<]+)<',                       # coveplayer
+                r'<input type="hidden" id="pbs_video_id_[0-9]+" value="([0-9]+)"/>',  # jwplayer
+            ]
+
+            media_id = self._search_regex(
+                MEDIA_ID_REGEXES, webpage, 'media ID', fatal=False, default=None)
+            if media_id:
+                return media_id, presumptive_id, upload_date
+
+            # Fronline video embedded via flp
+            video_id = self._search_regex(
+                r'videoid\s*:\s*"([\d+a-z]{7,})"', webpage, 'videoid', default=None)
+            if video_id:
+                # pkg_id calculation is reverse engineered from
+                # http://www.pbs.org/wgbh/pages/frontline/js/flp2012.js
+                prg_id = self._search_regex(
+                    r'videoid\s*:\s*"([\d+a-z]{7,})"', webpage, 'videoid')[7:]
+                if 'q' in prg_id:
+                    prg_id = prg_id.split('q')[1]
+                prg_id = int(prg_id, 16)
+                getdir = self._download_json(
+                    'http://www.pbs.org/wgbh/pages/frontline/.json/getdir/getdir%d.json' % prg_id,
+                    presumptive_id, 'Downloading getdir JSON',
+                    transform_source=strip_jsonp)
+                return getdir['mid'], presumptive_id, upload_date
+
+            for iframe in re.findall(r'(?s)<iframe(.+?)></iframe>', webpage):
+                url = self._search_regex(
+                    r'src=(["\'])(?P<url>.+?partnerplayer.+?)\1', iframe,
+                    'player URL', default=None, group='url')
+                if url:
+                    break
+
+            mobj = re.match(self._VALID_URL, url)
+
+        player_id = mobj.group('player_id')
+        if not display_id:
+            display_id = player_id
+        if player_id:
+            player_page = self._download_webpage(
+                url, display_id, note='Downloading player page',
+                errnote='Could not download player page')
+            video_id = self._search_regex(
+                r'<div\s+id="video_([0-9]+)"', player_page, 'video ID')
+        else:
+            video_id = mobj.group('id')
+            display_id = video_id
+
+        return video_id, display_id, None
+
+    def _real_extract(self, url):
+        video_id, display_id, upload_date = self._extract_webpage(url)
+
+        if isinstance(video_id, list):
+            entries = [self.url_result(
+                'http://video.pbs.org/video/%s' % vid_id, 'PBS', vid_id)
+                for vid_id in video_id]
+            return self.playlist_result(entries, display_id)
+
+        info = self._download_json(
+            'http://video.pbs.org/videoInfo/%s?format=json&type=partner' % video_id,
+            display_id)
+
+        formats = []
+        for encoding_name in ('recommended_encoding', 'alternate_encoding'):
+            redirect = info.get(encoding_name)
+            if not redirect:
+                continue
+            redirect_url = redirect.get('url')
+            if not redirect_url:
+                continue
+
+            redirect_info = self._download_json(
+                redirect_url + '?format=json', display_id,
+                'Downloading %s video url info' % encoding_name)
+
+            if redirect_info['status'] == 'error':
+                raise ExtractorError(
+                    '%s said: %s' % (
+                        self.IE_NAME,
+                        self._ERRORS.get(redirect_info['http_code'], redirect_info['message'])),
+                    expected=True)
+
+            format_url = redirect_info.get('url')
+            if not format_url:
+                continue
+
+            if determine_ext(format_url) == 'm3u8':
+                formats.extend(self._extract_m3u8_formats(
+                    format_url, display_id, 'mp4', preference=1, m3u8_id='hls'))
+            else:
+                formats.append({
+                    'url': format_url,
+                    'format_id': redirect.get('eeid'),
+                })
+        self._sort_formats(formats)
+
+        rating_str = info.get('rating')
+        if rating_str is not None:
+            rating_str = rating_str.rpartition('-')[2]
+        age_limit = US_RATINGS.get(rating_str)
+
+        subtitles = {}
+        closed_captions_url = info.get('closed_captions_url')
+        if closed_captions_url:
+            subtitles['en'] = [{
+                'ext': 'ttml',
+                'url': closed_captions_url,
+            }]
+
+        # info['title'] is often incomplete (e.g. 'Full Episode', 'Episode 5', etc)
+        # Try turning it to 'program - title' naming scheme if possible
+        alt_title = info.get('program', {}).get('title')
+        if alt_title:
+            info['title'] = alt_title + ' - ' + re.sub(r'^' + alt_title + '[\s\-:]+', '', info['title'])
+
+        return {
+            'id': video_id,
+            'display_id': display_id,
+            'title': info['title'],
+            'description': info['program'].get('description'),
+            'thumbnail': info.get('image_url'),
+            'duration': int_or_none(info.get('duration')),
+            'age_limit': age_limit,
+            'upload_date': upload_date,
+            'formats': formats,
+            'subtitles': subtitles,
+        }