how to i can download windows 8 video controller dr iver
nviai and ati are the main vendors they both have web pages that scan and install the right driver. if it an onboard intel chipset go to intel web page and let intel drive scanner read and post your system info.
It depends on what a Video Controller is. If it is your Video Card then like smorizio said, NVidia, AMD and Intel are the primary sources for video cards. If it is for some other purpose say video capture, TV Tuner etc then the cards manufacturer's website would be the best source.