[Instagram] get the non-https link, as they are serving Akamai cert from a instagram.com domain

youtube_dl/extractor/common.py

@@ -318,10 +318,10 @@ class InfoExtractor(object):
     def _og_search_title(self, html, **kargs):
         return self._og_search_property('title', html, **kargs)
 
-    def _og_search_video_url(self, html, name='video url', **kargs):
-        return self._html_search_regex([self._og_regex('video:secure_url'),
-                                        self._og_regex('video')],
-                                       html, name, **kargs)
+    def _og_search_video_url(self, html, name='video url', secure=True, **kargs):
+        regexes = [self._og_regex('video')]
+        if secure: regexes.insert(0, self._og_regex('video:secure_url'))
+        return self._html_search_regex(regexes, html, name, **kargs)
 
     def _rta_search(self, html):
         # See http://www.rtalabel.org/index.php?content=howtofaq#single

youtube_dl/extractor/instagram.py

@@ -26,7 +26,7 @@ class InstagramIE(InfoExtractor):
 
         return [{
             'id':        video_id,
-            'url':       self._og_search_video_url(webpage),
+            'url':       self._og_search_video_url(webpage, secure=False),
             'ext':       'mp4',
             'title':     u'Video by %s' % uploader_id,
             'thumbnail': self._og_search_thumbnail(webpage),