Great quality of work high profile as well ( so if you were looking for another job at least you would stick out ), the length is more than fine, I have a feeling that 30 seconds should be enough to grab peoples attention, if you need more than that I think most recruiters have switched your showreel off.
With regards to showing a breakdown I agree with Honest, I again think that a recruiter doesn't give a shit, the people who are reviewing your reel are probably better at it then you are unless you are a boy genius it also makes a reel far to long, it looses pace which in turn makes the edit sloppy.

If you were searching for a(nother) job I would include a cover letter, maybe describing more in detail what you did per project and so on