@cpennington , Peter said you are OK with the change as-is, at least in the short term. In the interest of fixing up the release so we don't miss this week entirely, and because the old video player is going away in the near future, we will leave the code extending the XMLDescriptor. However, when Peter ports these changes to videoalpha, he will take the other approach you suggested so we aren't exporting a data field that we are no longer using.