Solution 1. Check the Adobe Flash Player plug-in
More often than not, problems with playing videos on sites is due to errors in the Adobe Flash Player plug-in used for videos. It is possible that the browser is using several Flash player plug-ins and one of them is conflicting. Check the plug-ins used:
For more information, see the section Plug-ins.
Solution 2. Turn off Turbo mode
The browser might be running in Turbo mode. To turn it off:
For more information, see the section Turbo mode.
Solution 3. Disable blocking Flash banners and video
More information can be found in the Extensions section.