Motivation for changes:

Since yesterday was getting this eror in log

2020-01-14 12:55:04 CRITICAL plugin LostFilm Received not 200 (OK) status
2020-01-14 12:55:04 WARNING task LostFilm Aborting task (plugin: lostfilm)

Detailed changes:

After this modification

-        if rss.get('status') != 200:
-            raise PluginError('Received not 200 (OK) status')
+        status = rss.get('status')
+        if status != 200:
+            raise PluginError('Received %s status instead of 200 (OK)' % status)

found out that actually http code was 301.
So finally fixing URL to use https did the trick.