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-rw-r--r--youtube_dl/InfoExtractors.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/youtube_dl/InfoExtractors.py b/youtube_dl/InfoExtractors.py
index d95423f7d..8dd1c0b07 100644
--- a/youtube_dl/InfoExtractors.py
+++ b/youtube_dl/InfoExtractors.py
@@ -402,7 +402,7 @@ class YoutubeIE(InfoExtractor):
url_data_strs = video_info['url_encoded_fmt_stream_map'][0].split(',')
url_data = [parse_qs(uds) for uds in url_data_strs]
url_data = filter(lambda ud: 'itag' in ud and 'url' in ud, url_data)
- url_map = dict((ud['itag'][0], ud['url'][0]) for ud in url_data)
+ url_map = dict((ud['itag'][0], ud['url'][0] + '&signature=' + ud['sig'][0]) for ud in url_data)
format_limit = self._downloader.params.get('format_limit', None)
available_formats = self._available_formats_prefer_free if self._downloader.params.get('prefer_free_formats', False) else self._available_formats