+class WDRBaseIE(InfoExtractor):
+    def _extract_wdr_video(self, webpage, display_id):
+        # for wdr.de the data-extension is in a tag with the class "mediaLink"
+        # for wdr.de radio players, in a tag with the class "wdrrPlayerPlayBtn"
+        # for wdrmaus, in a tag with the class "videoButton" (previously a link
+        # to the page in a multiline "videoLink"-tag)
+        json_metadata = self._html_search_regex(
+            r'''(?sx)class=
+                    (?:
+                        (["\'])(?:mediaLink|wdrrPlayerPlayBtn|videoButton)\b.*?\1[^>]+|
+                        (["\'])videoLink\b.*?\2[\s]*>\n[^\n]*
+                    )data-extension=(["\'])(?P<data>(?:(?!\3).)+)\3
+            ''',
+            webpage, 'media link', default=None, group='data')
+
+        if not json_metadata:
+            return
+
+        media_link_obj = self._parse_json(json_metadata, display_id,
+                                          transform_source=js_to_json)
+        jsonp_url = media_link_obj['mediaObj']['url']
+
+        metadata = self._download_json(
+            jsonp_url, display_id, transform_source=strip_jsonp)
+
+        metadata_tracker_data = metadata['trackerData']
+        metadata_media_resource = metadata['mediaResource']
+
+        formats = []
+
+        # check if the metadata contains a direct URL to a file
+        for kind, media_resource in metadata_media_resource.items():
+            if kind not in ('dflt', 'alt'):
+                continue
+
+            for tag_name, medium_url in media_resource.items():
+                if tag_name not in ('videoURL', 'audioURL'):
+                    continue
+
+                ext = determine_ext(medium_url)
+                if ext == 'm3u8':
+                    formats.extend(self._extract_m3u8_formats(
+                        medium_url, display_id, 'mp4', 'm3u8_native',
+                        m3u8_id='hls'))
+                elif ext == 'f4m':
+                    manifest_url = update_url_query(
+                        medium_url, {'hdcore': '3.2.0', 'plugin': 'aasp-3.2.0.77.18'})
+                    formats.extend(self._extract_f4m_formats(
+                        manifest_url, display_id, f4m_id='hds', fatal=False))
+                elif ext == 'smil':
+                    formats.extend(self._extract_smil_formats(
+                        medium_url, 'stream', fatal=False))
+                else:
+                    a_format = {
+                        'url': medium_url
+                    }
+                    if ext == 'unknown_video':
+                        urlh = self._request_webpage(
+                            medium_url, display_id, note='Determining extension')
+                        ext = urlhandle_detect_ext(urlh)
+                        a_format['ext'] = ext
+                    formats.append(a_format)
+
+        self._sort_formats(formats)
+
+        subtitles = {}
+        caption_url = metadata_media_resource.get('captionURL')
+        if caption_url:
+            subtitles['de'] = [{
+                'url': caption_url,
+                'ext': 'ttml',
+            }]
+
+        title = metadata_tracker_data['trackerClipTitle']
+
+        return {
+            'id': metadata_tracker_data.get('trackerClipId', display_id),
+            'display_id': display_id,
+            'title': title,
+            'alt_title': metadata_tracker_data.get('trackerClipSubcategory'),
+            'formats': formats,
+            'subtitles': subtitles,
+            'upload_date': unified_strdate(metadata_tracker_data.get('trackerClipAirTime')),
+        }
+
+
+class WDRIE(WDRBaseIE):
+    _CURRENT_MAUS_URL = r'https?://(?:www\.)wdrmaus.de/(?:[^/]+/){1,2}[^/?#]+\.php5'
+    _PAGE_REGEX = r'/(?:mediathek/)?[^/]+/(?P<type>[^/]+)/(?P<display_id>.+)\.html'
+    _VALID_URL = r'(?P<page_url>https?://(?:www\d\.)?wdr\d?\.de)' + _PAGE_REGEX + '|' + _CURRENT_MAUS_URL