What is your operating system, version & edition?
What is your web browser?
What is not working? (Please provide a screenshot here in the forum, not some dubious 3rd-party hosting site.)
Could you follow the document here which details a few troubleshooting steps and instructions on how to report video issue to us?
You can revert to previous versions by doing a clean install, but using an older version posted on our Archive page (though not recommended).