User Should follow this step-by-step if they are experiencing "video expired" error and can't click on any cams or can't start their cam.
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1) Go to this link- http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager07.html
2) Close the chatroom page and Click "delete all sites" on a website you just opened by clicking that link.
3) Now, Clear Cookies, Cache and History of your browser under "Tools". DONE!
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Remember, do it step-by-step, it has been tried and it works.
Thanks you, Have a nice day/night.