some improvement

app/torrent/models.py

@@ -69,7 +69,7 @@ class File(models.Model):
     def abs_pathname(self):
         return settings.DOWNLOAD_BASE_DIR / self.pathname
 
-    @property
+    @cached_property
     def mime_types(self):
         mime = mimetypes.guess_type(self.pathname)
         if mime:
@@ -79,11 +79,15 @@ class File(models.Model):
 
     @property
     def is_stream_video(self):
-        return self.pathname.stem in ["mp4", "flv", "webm"]
+        video_extensions = ["mp4", "flv", "webm"]
+        return self.pathname.suffix.lower() in video_extensions
 
     @property
     def is_video(self):
-        return self.pathname.stem in ["mp4", "flv", "webm", "avi", "mkv"]
+        if self.mime_types.startswith("video/"):
+            return True
+        video_extensions = ['.mp4', '.flv', '.webm', '.avi', '.mkv', '.mov', '.wmv']
+        return self.pathname.suffix.lower() in video_extensions
 
     @property
     def accel_redirect(self):