[addanime] improve

youtube_dl/extractor/__init__.py

@@ -1,4 +1,5 @@
 from .appletrailers import AppleTrailersIE
+from .addanime import AddAnimeIE
 from .archiveorg import ArchiveOrgIE
 from .ard import ARDIE
 from .arte import ArteTvIE

youtube_dl/extractor/appletrailers.py

@@ -91,7 +91,7 @@ class AppleTrailersIE(InfoExtractor):
                 duration = 60 * int(m.group('minutes')) + int(m.group('seconds'))
 
             formats = []
-            for formats_el in li.findall('.//li/a'):
+            for formats_el in li.findall('.//a'):
                 if formats_el.attrib['class'] != 'OverlayPanel':
                     continue
                 target = formats_el.attrib['target']

youtube_dl/extractor/common.py

@@ -129,7 +129,7 @@ class InfoExtractor(object):
         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
             if errnote is None:
                 errnote = u'Unable to download webpage'
-            raise ExtractorError(u'%s: %s' % (errnote, compat_str(err)), sys.exc_info()[2])
+            raise ExtractorError(u'%s: %s' % (errnote, compat_str(err)), sys.exc_info()[2], cause=err)
 
     def _download_webpage_handle(self, url_or_request, video_id, note=None, errnote=None):
         """ Returns a tuple (page content as string, URL handle) """