bugfix for lost video previews

player/content/mediaentry.py

@@ -132,21 +132,24 @@ class MediaFileData():
         self.content_type = None
         self.data_stream = '{}{}'.format(server_,json_[
             '_json-roa']['relations']['data-stream']['href'])
-        self.previews = {}
+        self.previews = []
 
     def add_preview(self, preview_):
         # TODO: Remove once the API delivers this for MediaFile.
         if self.media_type is None or self.media_type is 'image':
             self.media_type = preview_.media_type
-        self.previews[preview_.thumbnail] = preview_
+        self.previews.append(preview_)
 
     def get_preview(self, size_:str="x_large"):
         # maximum, x_large, large, medium, small_125, small
-        p = None
-        for k, v in self.previews.items():
-            if v.content_type == 'video/mp4':
-                return v
-        return self.previews.get(size_)
+        # look for videos first
+        for i in self.previews:
+            if i.content_type == 'video/mp4':
+                return i
+        for i in self.previews:
+            if i.thumbnail == size_:
+                return i
+        return None
 
     def guess_media_type(self):
         # This is just an ugly way to determine the media type as the API doesn't tell.