People knock these videos (with good reasion) but watch the chin/pullup variations thats the key to a big back.
my back was pathetic before i started doing them seriously i never did any chins/pullups after a few months i added some good width to my lats.
I would give the rest of the video a watch just for the fun of it, imagine your gym PT doing these.
loads of variations there good for your tricep as well.
http://www.dailymotion.com/relevance...tness-13_sport http://www.dailymotion.com/relevance...tness-23_sport http://www.dailymotion.com/relevance...tness-33_sport