add vid_type filter for download list view

backend/download/serializers.py

@@ -42,6 +42,9 @@ class DownloadListQuerySerializer(
     filter = serializers.ChoiceField(
         choices=["pending", "ignore"], required=False
     )
+    vid_type = serializers.ChoiceField(
+        choices=VideoTypeEnum.values_known(), required=False
+    )
     channel = serializers.CharField(required=False, help_text="channel ID")
     page = serializers.IntegerField(required=False)
 

backend/download/views.py

@@ -65,6 +65,12 @@ class DownloadApiListView(ApiBaseView):
                 {"term": {"channel_id": {"value": filter_channel}}}
             )
 
+        vid_type_filter = validated_data.get("vid_type")
+        if vid_type_filter:
+            must_list.append(
+                {"term": {"vid_type": {"value": vid_type_filter}}}
+            )
+
         self.data["query"] = {"bool": {"must": must_list}}
 
         self.get_document_list(request)