A scene from the 2004 comedy “Anchorman” starring Will Ferrell, left, and Christina Applegate, center, standing. Austerlitz’s “Kind of a Big Deal” is a wickedly sharp, discursive study of a movie that has cast a long shadow on 21st-century comedy, particularly a group of seemingly perpetual post-adolescents — including “Anchorman” co-writer Ferrell, co-writer-director Adam McKay and producer Judd Apatow — …
