diff --git a/app/controllers/downloads_controller.rb b/app/controllers/downloads_controller.rb
index d721a3bbaa..81108e9a9c 100644
--- a/app/controllers/downloads_controller.rb
+++ b/app/controllers/downloads_controller.rb
@@ -13,6 +13,8 @@ def show
   end
 
   def send_content
+    # Only append auth tokens to HLS if necessary, otherwise let normal behavior
+    # take care of sending it.
     return send_hls if file_desc.mime_type.first.to_s == "application/x-mpegURL" && params[:auth_token].present?
     prepare_file_headers
     # Necessary until a Rack version is released which allows for multiple
diff --git a/app/resources/nested_resources/file_metadata.rb b/app/resources/nested_resources/file_metadata.rb
index 31cfefb2fb..5618f524a3 100644
--- a/app/resources/nested_resources/file_metadata.rb
+++ b/app/resources/nested_resources/file_metadata.rb
@@ -42,6 +42,7 @@ def derivative?
     use.include?(Valkyrie::Vocab::PCDMUse.ServiceFile)
   end
 
+  # ServiceFilePartial isn't part of the PCDMUse vocabulary - this is made up
   def derivative_partial?
     use.include?(Valkyrie::Vocab::PCDMUse.ServiceFilePartial)
   end