Make sure you also update windows as well. Also update your web-browser and I hope your using firefox. If you are still having problems then roll back to your previous working drivers and do some googling. That is what I usually do before I update anything in terms of drivers because there can be alot and I mean alot of conflicts with software.
Also give us some specs to your computer. Is the video playback in the webrowser (meaning you can see shit on windows media player within the webbrowser or quicktime).