Fix youtube video index

apps/content/models.py

@@ -1,3 +1,4 @@
+from urllib.parse import urlparse
 from django.db import models
 
 from polymorphic.models import PolymorphicModel
@@ -69,6 +70,12 @@ class Video(Content):
     url = models.URLField('Ссылка')
 
     def video_index(self):
+        if 'youtu.be' in self.url or 'youtube.com' in self.url and 'watch' in self.url:
+            url = urlparse(self.url)
+            query = url.query.split('&')
+            for q in query:
+                if 'v=' in q:
+                    return q.split('=')[-1]
         return self.url.split('/')[-1]