Problems playing live webinars are usually caused by security restrictions on your local PC or network.
We have a System Test available at https://www.brighttalk.com/pages/customer-support/test-your-system that you can use to troubleshoot your system configuration. Follow the instructions on that page to perform the first and third tests and receive advice on how to fix the problem.
In addition, you can refer your IT network administrators to the following page for more information:
Clearing your cache and cookies can help with many types of browser functionality issues, including sign-in problems, error messages, webpages hanging or freezing, content not updating, and browser applications not responding.