[globo] Improve m3u8 extraction

youtube_dl/extractor/globo.py

@@ -367,7 +367,10 @@ class GloboIE(InfoExtractor):
             resource_url = resource['url']
             signed_url = '%s?h=%s&k=%s' % (resource_url, signed_hash, 'flash')
             if resource_id.endswith('m3u8') or resource_url.endswith('.m3u8'):
-                formats.extend(self._extract_m3u8_formats(signed_url, resource_id, 'mp4'))
+                m3u8_formats = self._extract_m3u8_formats(
+                    signed_url, resource_id, 'mp4', m3u8_id='hls', fatal=False)
+                if m3u8_formats:
+                    formats.extend(m3u8_formats)
             else:
                 formats.append({
                     'url': signed_url,