"There's very little room in an app game where you can expand on story," said Nick Dorra, Rovio's head of animation, in his April 1st keynote at the MIPTV conference in Cannes, France.

The storytelling magic of animation, however, will allow Angry Birds' creators to delve deeper into the characters' backstories.

"For example, why are they always angry?" asked Dorra.

The Angry Birds video series will debut this fall, the MIP Blog . Each of the 52 episodes will run from 2.5 to 3 minutes and will be available "on all possible devices," said Dorra.

The Angry Birds feature film, which Rovio is developing with former Marvel Studios chief David Maisel, won't arrive until 2013 or 2014.