BleepingComputer.com: Video being filtered? (I'm a newbie)

Ok I will try to explain this the best I can, I really don't know much about computers but I can follow directions well! When I am on website that has a video posted to watch, the box that the video would be in is all white and there is a little icon at the top right side that has red, green, blue, and yellow in it. Its the same type of thing you see when images are being filtered and there is a red X in the corner. I don't know how to fix this, my computer used to play videos without a problem but now I don't even have the option. I was thinking it was a firewall setting or some type of security setting but I am clueless on where to look and what to change... Any help would be appreciated, I tried the search button first, but it's hard to search for something when you don't even know what to search for!

My operating system is XP

Thanks for the help!

I guess you need to re-install Adobe Flash. Close all browsers and then install Adobe Flash.

For Internet Explorer:
http://www.filehippo.com/download_flashplayer_ie/

For Firefox, opera etc:
http://www.filehippo.com/download_flashplayer_firefox/

You should check by visiting a standard web site like Youtube.

You can also check/update your Adobe add-ons by visiting here:

http://www.adobe.com/shockwave/welcome/