Canon T3 or Nikon D3100?

Witch one you guy's think is better for filming. My main purpose for the camera is to film not so much take pictures

Filming?
Neither. Both are digital SLR's and can only shoot stills and video (to a lesser extent)
If your really, really want to shoot video, you need to forget about using a dSLR.
http://www.luminous-landscape.com/reviews/camcorders/cam-cam.shtml

Well since neither does film then neither. Film is another media all together and has nothing to do with digital cameras. Have you ever seen real film?
You can shoot video with a digital camera but that's not film.
I own and only recommend Canon.

Get the nikon d3 but its a few grand plus