diff --git a/youtube_dl/extractor/generic.py b/youtube_dl/extractor/generic.py
index a3de0ba60a..300485c7f8 100644
--- a/youtube_dl/extractor/generic.py
+++ b/youtube_dl/extractor/generic.py
@@ -291,6 +291,9 @@ def _real_extract(self, url):
         except compat_xml_parse_error:
             pass
 
+        # Sometimes embedded video player is hidden behind percent encoding
+        # (e.g. https://github.com/rg3/youtube-dl/issues/2448)
+        # Unescaping the whole page allows to handle those cases in a generic way
         webpage = compat_urllib_parse.unquote(webpage)
 
         # it's tempting to parse this further, but you would