Shader Forge Wiki on Triplanar mapping
http://acegikmo.com/shaderforge/wiki/index.php?title=Triplanar_Mapping
Shader Forge Forum (I posted a comment regarding the shader)
http://neatcorporation.com/forums/viewtopic.php?f=4&t=1969
There are some differences between the shader I showed in the video and the one on the forums, the 'Texture Map 2 Amount' slider is hooked up differently, same with the 'Channel Blend'.