I’ve put a video on YouTube to go over the presentation of the isom presheaf, and how to think of it as a fibered category which happens to be equivalent to a category fibered in sets (and hence a presheaf).
Algebraic Stacks
UGA MATH 8830, Fall 2014. An introductory course in the theory of Descent, Algebraic Spaces and Algebraic Stacks.
dkrashen@math.uga.edu
