+            webpage, 'iframe url', default=None)
+        if iframe_url is None:
+            return self.url_result(redirect_url, 'Generic')
+
+        iframe = self._download_webpage(iframe_url, video_id, 'Downloading iframe page')
+
+        duration = None
+        sources = []
+
+        sd_url = self._search_regex(
+            r'<source[^>]+src=(["\'])(?P<url>.+?)\1', iframe,
+            'sd video url', default=None, group='url')
+        if sd_url:
+            sources.append((sd_url, 'sd'))
+
+        options = self._parse_json(
+            self._search_regex(
+                r'data-crt-options=(["\'])(?P<options>.+?)\1', iframe,
+                'hd video url', default='', group='options'),
+            video_id, fatal=False)
+        if options:
+            duration = int_or_none(options.get('duration'))
+            hd_url = options.get('hdUrl')
+            if hd_url:
+                sources.append((hd_url, 'hd'))
+
+        formats = [{
+            'url': video_url,
+            'ext': 'mp4',
+            'format_id': format_id,
+            'height': int_or_none(self._search_regex(
+                r'/(\d{3,4})$', video_url, 'height', default=None)),
+            'quality': quality,
+        } for quality, (video_url, format_id) in enumerate(sources)]
+
+        self._sort_formats(formats)