According to the lead cinematic director Kun Chang, Watch Dogs contains 110 minutes of cinematics.
Quote from Kun Chang:
"I directed 110 minutes of cinematics for the game Watch Dogs."
"Watch Dogs was finally revealed at E3 winning tons of nominations and awards. This is the super secret project I have been working on for the last 6 months. I directed the opening and all of the cinematics and also worked as a realization director on the demo."
Watch Dogs is due to release sometime in April-June 2014 for the PC, PlayStation 3, PlayStation 4, Xbox 360, and Xbox One.