Thank you for using our services. Add the following line in the <toolboxControls> section in the web.config of your updated site:
"Video content control"
I would suggest that you compare the web configs of your updated site and a fresh Sitefinity site so that you can see what else you might be missing from the new functionality we have added. Compare the <toolboxControls> sections to see what other controls you are missing.
the Telerik team