+    _VALID_URL = r'''(?x)
+        (?:
+            http://(?:v|player)\.youku\.com/(?:v_show/id_|player\.php/sid/)|
+            youku:)
+        (?P<id>[A-Za-z0-9]+)(?:\.html|/v\.swf|)
+    '''
+    _TEST = {
+        'url': 'http://v.youku.com/v_show/id_XNDgyMDQ2NTQw.html',
+        'md5': 'ffe3f2e435663dc2d1eea34faeff5b5b',
+        'params': {
+            'test': False
+        },
+        'info_dict': {
+            'id': 'XNDgyMDQ2NTQw_part00',
+            'ext': 'flv',
+            'title': 'youtube-dl test video "\'/\\ä↭𝕐'
+        }
+    }