videos dont go into itunes library

i recently downloaded red vs blue of Google video cos they had a opshon down lode for apple ipod so i did wen i tried putting it in the itunes library it dosnet work and also wen i try playing it in quick time it sed error this is a file that quick time dos not recognize so how do i fix this problem
o yea its a ipod tuch 16 GB if that makes a difference
sory if my speling s bad steal workin on it