'embedURL', webpage, 'embed URL', fatal=True)
         description = self._search_regex(
             r'<p[^>]+itemprop="description">([^<]+)</p>',
-            webpage, 'description', fatal=False)
+            webpage, 'description', default=None) or self._og_search_description(webpage)
         timestamp = parse_iso8601(
             self._search_regex(
-                r'<span itemprop="datePublished" content="([^"]+)">',
+                r'<span[^>]+itemprop="(?:datePublished|uploadDate)"[^>]+content="([^"]+)"',
                 webpage, 'upload date', fatal=False))
         return {
             '_type': 'url_transparent',
                     src + '?hdcore=3.7.0&plugin=aasp-3.7.0.39.44', video_id, f4m_id='hds'))
             elif ext == 'm3u8':
                 formats.extend(self._extract_m3u8_formats(
-                    src, video_id, m3u8_id='hls', entry_protocol='m3u8_native'))
+                    src, video_id, 'mp4', m3u8_id='hls', entry_protocol='m3u8_native'))
             else:
                 quality = f.get('quality')
                 ff = {