fix(video): update queryset optimization to prefetch playlists instead of videos

apps/video/views.py

@@ -30,10 +30,10 @@ class VideoCategoryListAPIView(generics.ListAPIView):
     
     def get_queryset(self):
         """
-        Optimized queryset with prefetch_related for videos
+        Optimized queryset with prefetch_related for playlists
         """
         return VideoCategory.objects.filter(status=True).prefetch_related(
-            'videos'
+            'playlists'
         ).order_by('order')