Nikon Lenses mounted on Canon Body?

I have a bunch of nikon lenses and want to attach them to a Canon T2i for video purposes. Does anyone know how? Do i need a converter or something?

Here's one example that I found. Be aware that G series lenses won't let you adjust the aperture as they don't have an aperture ring.

http://www.amazon.com/...B002JWYAXA

By the way, smart move using Nikon optics for video. George Lucas did that for the first Star Wars!