Well, does it work at all on any sites using Flash content/ Flash based video playback? If so, the issues may be specific to the sites. also, did you try other browsers? Chrome uses its own implementation of Flash and is not dependent on these updates for instance. What operating system are you on? Too many variables here. Could also be something with hardware acceleration options and compatibility issues with your graphics setup... Anyway, there's a whoel forum for Flash Player, so maybe ask there...
Moving this discussion to the Installing Flash Player forum.
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