I’m trying to accomplish what they did starting at about 3:05. What i did was copied they object, and baked ambient occlusion onto it (copying the object might be unnecesary). Worked great. Problem is, where do i map it to? i tried amb, but it doesn’t seem to do anything. I am using glsl.
Ambient occlusion is usually mapped to color with blending mode multiply.
cool thanks 
Also, how come when i AO map, i get these weird seams? by this, i mean black area around the edges, making the edges clear.
I think increasing the margin in the baking menu can solve your problem, but be sure your UV texture has some margin between each different face.