After downloading the latest version of Adobe flash, I still cannot play any videos, when I click on the video, I get the following message: you seem to need to download Adobe Flash.
Moving this discussion to the Installing Flash Player forum.
For MAC: Can you check to see if you have "enable plug-ins" checked in Safari's preferences dialog, under the security tab? If not, enable it and check.
It seems to be a browser specific issue. Try a different browser like chrome or firefox, it should work.
For fixing IE or Safari, lets follow below suggestions :
Run the Flash Player Uninstaller as applicable for your machine(i.e.Windows or MAC) and remove flash player.
Restart the machine.
Download and Re-install Flash Player.
Restart the browser and check.
You might also wanna check the below articles ::
Enabling Flash Player in Internet Explorer 9 : http://forums.adobe.com/thread/885448
ActiveX Filtering in Internet Explorer 9 : http://forums.adobe.com/thread/867968