diff --git a/common/lib/xmodule/xmodule/videoalpha_module.py b/common/lib/xmodule/xmodule/videoalpha_module.py
index 6754f8f664..83d0b4badd 100644
--- a/common/lib/xmodule/xmodule/videoalpha_module.py
+++ b/common/lib/xmodule/xmodule/videoalpha_module.py
@@ -93,7 +93,7 @@ class VideoAlphaModule(VideoAlphaFields, XModule):
         return result
 
     def _get_timeframe(self, xmltree):
-        """ Converts 'from' and 'to' parameters in video tag to seconds.
+        """ Converts 'start_time' and 'end_time' parameters in video tag to seconds.
         If there are no parameters, returns empty string. """
 
         def parse_time(s):
@@ -107,7 +107,7 @@ class VideoAlphaModule(VideoAlphaFields, XModule):
                                       minutes=x.tm_min,
                                       seconds=x.tm_sec).total_seconds()
 
-        return parse_time(xmltree.get('from')), parse_time(xmltree.get('to'))
+        return parse_time(xmltree.get('start_time')), parse_time(xmltree.get('end_time'))
 
     def handle_ajax(self, dispatch, get):
         """Handle ajax calls to this video.