Fix duplicated downloads from YouTube user page where watch URLs are not always end with &. Stop scan on closing bracker prevents regexp to capture two links instead of one.

youtube-dl

@@ -2548,7 +2548,7 @@ class YoutubeUserIE(InfoExtractor):
 	_TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
 	_GDATA_PAGE_SIZE = 50
 	_GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d'
-	_VIDEO_INDICATOR = r'/watch\?v=(.+?)&'
+	_VIDEO_INDICATOR = r'/watch\?v=(.+?)[\<&]'
 	_youtube_ie = None
 	IE_NAME = u'youtube:user'