diff --git a/youtube_dl/extractor/twentyfourvideo.py b/youtube_dl/extractor/twentyfourvideo.py
index d16f55500..1d66eeaff 100644
--- a/youtube_dl/extractor/twentyfourvideo.py
+++ b/youtube_dl/extractor/twentyfourvideo.py
@@ -14,7 +14,18 @@ from ..utils import (
 
 class TwentyFourVideoIE(InfoExtractor):
     IE_NAME = '24video'
-    _VALID_URL = r'https?://(?P<host>(?:www\.)?24video\.(?:net|me|xxx|sexy?|tube|adult|site))/(?:video/(?:view|xml)/|player/new24_play\.swf\?id=)(?P<id>\d+)'
+    _VALID_URL = r'''(?x)
+                    https?://
+                        (?P<host>
+                            (?:(?:www|porno)\.)?24video\.
+                            (?:net|me|xxx|sexy?|tube|adult|site)
+                        )/
+                        (?:
+                            video/(?:(?:view|xml)/)?|
+                            player/new24_play\.swf\?id=
+                        )
+                        (?P<id>\d+)
+                    '''
 
     _TESTS = [{
         'url': 'http://www.24video.net/video/view/1044982',
@@ -45,6 +56,9 @@ class TwentyFourVideoIE(InfoExtractor):
     }, {
         'url': 'https://www.24video.site/video/view/2640421',
         'only_matching': True,
+    }, {
+        'url': 'https://porno.24video.net/video/2640421-vsya-takaya-gibkaya-i-v-masle',
+        'only_matching': True,
     }]
 
     def _real_extract(self, url):