https://get.adobe.com/flashplayer/
To update adobe flash player.
Have you updated your Nvidia drivers?
If you dont update drivers yourself let Microsoft update do it.
Solve video playback issues
If you experience problems when playing back video, follow these steps:
Try disabling hardware acceleration. Right-click the Flash Player logo below, choose Settings from the context menu. Deselect Enable Hardware Acceleration (on the Display tab), then and click Close.
See the sample stage videos from the Adobe site.
If disabling hardware acceleration solves the problem, it's possible you have a video card driver-specific issue. To help Adobe address the issue, follow the directions below to report the issue.
If you are using Microsoft Windows, try updating your driver.
Windows Update does not update device drivers by default. See the following Microsoft article for information on how to update your drivers:
http://windows.microsoft.com/en-US/windows7/Update-a-driver-for-hardware-that-isnt-working-properly . You can sometimes obtain driver updates from your PC manufacturer or from your video adapter manufacturer:
ATI/AMD:
http://support.amd.com/us/gpudownload/Pages/index.aspx
Intel:
http://www.intel.com/support/detect.htm
nVidia:
http://www.nvidia.com/Download/Scan.aspx?lang=en-us
VIA:
http://www.via.com.tw/en/support/drivers.jsp
After updating the driver (and restarting your computer as needed), reenable hardware acceleration in Flash Player (following the steps above). Check to see if the video playback issues have been resolved. If it has not been resolved, follow the directions below to report the issue.
Nvidia Geforce 210 supports H.264 play back so HTML5 shouldn't be a problem.
In firefox 20 and above you can also enable h.264 playback when your operating system supports it & provides the codecs.
enter about:config into the firefox location bar (confirm the info message in case it shows up) & search for the preference named media.windows-media-foundation.enabled. double-click it and change its value to true.