[vimeo] Fix password protected videos (Closes #5001)

youtube_dl/extractor/vimeo.py

@@ -4,6 +4,7 @@
 import json
 import re
 import itertools
+import hashlib
 
 from .common import InfoExtractor
 from .subtitles import SubtitlesInfoExtractor
@@ -225,6 +226,10 @@ def _real_extract(self, url):
         if mobj.group('pro') or mobj.group('player'):
             url = 'http://player.vimeo.com/video/' + video_id
 
+        password = self._downloader.params.get('videopassword', None)
+        if password:
+            headers['Cookie'] = '%s_password=%s' % (video_id, hashlib.md5(password).hexdigest())
+
         # Retrieve video webpage to extract further information
         request = compat_urllib_request.Request(url, None, headers)
         try: