Hat tip to reader "TimK" for this one. It's a couple of weeks old, but still relevant for Denver, and really for any other team undergoing a major change in coaching and/or personnel.
Laurie Lattimore-Volkmann and "shasta77" (who is identified as "a former player and coach who has grown up in a football household, learning to break down film at an early age from his player/coach father") borrow openly and liberally from Matt Bowen's explanation of NFL route trees on Bleacher Report, then break down how receivers will adjust their routes both before and after the snap, depending on what they see from the defense.