i am doing up my cousins wedding video, im up to the vids from the reception, the room was quite dark and you can't see anything in the vids. does anyone know a free program that i can change the brightness or whateva needs to be done??

Help would be appreciated

VirtualDub will do what you want (be it a pain in the arse), or even Windows Movie Maker has fairly basic brightness adjustment.

You'll probably need Adobe Premier or something to pull it off.

Since it's a wedding video, I'd suggest Premiere or After Effects or Final Cut if you are on a mac

you can also try http://www.sonycreativesoftware.com/vegaspro download the free trial

If your really wanna the best, I suggest you to use Sony Vagas download the trial and look on Youtube for activation keys. That software works awesome.