It's old and been recommended before but I rewatched the first episode of Abstract: The Art Of Design with a friend last night and thought I'd post for anyone who hadn't seen them.
8 45minute documentaries about a designer of some kind (illustrator is the first one, guy who designed the Nike air trainers is the second, there's an architect, a stage designer and some others), basically just them talking about their practice.
Really well done, interesting documentaries about design, even if you're not interested in the thing they are doing, it's interesting to hear them talk about their process, philosophy and ideas.
Don't mistake it for another series recently released which I think is called The Art of..., and I assumed was another series of these but actually had 3 or 4 different people in each episode so none had enough time to be of interest, and was a really poor series.