‘Between Two Ferns’ plants lots of laughs

"Between Two Ferns: The Movie" is perhaps inevitably best consumed in bite-sized bits, bringing back Zach Galifianakis from his popular web series as the worst (or depending on one's point of view, best) celebrity interviewer ever. The movie's conceit is hit-miss, but when it works -- yielding deadpan insults and pained expressions -- there are enough laughs to make digging up "Ferns" look like a fine idea.