What OS are you using?
Most such stuff is because of your Display Cards driver. You might be using an old driver not updated one, or you're using the OS's standard driver which won't give you the full capabilities of your system.
Also, upgrade your adobe-flash that is used to show you the flash videos in the browsers themselves.
If you need further help, don't hesitate to ask.
The one who doesn't fall, doesn't stand up
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