use channel and keyword values

recommendation_engine.py

@@ -78,8 +78,8 @@ class Engine:
         return clips
 
     def get_videos(self, user):
-        channels = self.state['channels']
-        sliders = self.state['keywords']
+        channels = {k: v.get('value', 0) for k, v in self.state['channels'].items()}
+        sliders = {k: v.get('value', 0) for k, v in self.state['keywords'].items()}
         # For each playlist, compute keyword score
         score = {}
         for playlist in self.playlists: