The goal of this video is to help you better understand the 'error distribution' and 'link function' in Generalized Linear Models.
For a deeper understanding of GLM's, I'd recommend the book "Generalized Linear Models" by McCullagh and Nelder. This is a book well worth buying, but I also (somehow) found an online version: http://www.utstat.toronto.edu/~brunner/oldclass/2201s11/readings/glmbook.pdf