Avoid crash reported in issue #86

diff --git a/youtube-dl b/youtube-dl
index d848595..cbfbdca 100755 (executable)
--- a/youtube-dl
+++ b/youtube-dl
@@ -1079,7 +1079,7 @@ class YoutubeIE(InfoExtractor):
                # Decide which formats to download
                req_format = self._downloader.params.get('format', None)
 
-               if 'fmt_url_map' in video_info:
+               if 'fmt_url_map' in video_info and len(video_info['fmt_url_map']) >= 1 and ',' in video_info['fmt_url_map'][0]:
                        url_map = dict(tuple(pair.split('|')) for pair in video_info['fmt_url_map'][0].split(','))
                        format_limit = self._downloader.params.get('format_limit', None)
                        if format_limit is not None and format_limit in self._available_formats: