[odnoklassniki] Detect paid videos

youtube_dl/extractor/odnoklassniki.py

@@ -115,6 +115,10 @@ class OdnoklassnikiIE(InfoExtractor):
     }, {
         'url': 'https://m.ok.ru/dk?st.cmd=movieLayer&st.discId=863789452017&st.retLoc=friend&st.rtu=%2Fdk%3Fst.cmd%3DfriendMovies%26st.mode%3Down%26st.mrkId%3D%257B%2522uploadedMovieMarker%2522%253A%257B%2522marker%2522%253A%25221519410114503%2522%252C%2522hasMore%2522%253Atrue%257D%252C%2522sharedMovieMarker%2522%253A%257B%2522marker%2522%253Anull%252C%2522hasMore%2522%253Afalse%257D%257D%26st.friendId%3D561722190321%26st.frwd%3Don%26_prevCmd%3DfriendMovies%26tkn%3D7257&st.discType=MOVIE&st.mvId=863789452017&_prevCmd=friendMovies&tkn=3648#lst#',
         'only_matching': True,
+    }, {
+        # Paid video
+        'url': 'https://ok.ru/video/954886983203',
+        'only_matching': True,
     }]
 
     def _real_extract(self, url):
@@ -244,6 +248,11 @@ class OdnoklassnikiIE(InfoExtractor):
                 'ext': 'flv',
             })
 
+        if not formats:
+            payment_info = metadata.get('paymentInfo')
+            if payment_info:
+                raise ExtractorError('This video is paid, subscribe to download it', expected=True)
+
         self._sort_formats(formats)
 
         info['formats'] = formats