In this video we walk through a tutorial for Generalized Linear Models in R. The main goal is to show how to use this type of model, focusing on logistic regression, and talk a bit about why it's a good tool to know.
The tutorial discusses both GLM and multilevel models, but the video has been split into two parts.
https://github.com/ccs-amsterdam/r-course-material/blob/master/tutorials/advanced_modeling.md
We also have a more dedicated tutorial for GLM in R. It's best to view on the github html preview, but youtube messes up these links, so you'll have to find the link on this page under 'statistical analysis - generalized linear models'
https://github.com/ccs-amsterdam/r-course-material
A great book on GLM (of which I'm not sure whether the digital version should be freely available, but hey, I just stumbled upon this pdf:
http://www.utstat.toronto.edu/~brunner/oldclass/2201s11/readings/glmbook.pdf