Film The Toronto International Film Festival has what seems like an annual talk about the distribution and especially digital distribution of films. To watch your way through this series is to hear people in the industry describe the landscape changing across time.
If you're only going to watch one of them, I'd choose 2012 if only because its the one in which the distributors have an actual, passive aggressive literal tiff with the US contingent looking at the British contingent in the form of Curzon as though he's landed from Mars.
Oh and notice throughout how Netflix is pretty much treated with the same courtesy as the Germans in Fawlty Towers.
This is what I've been able to find but you could have a glance through this search in case there's anything I've missed.