Closing the loop on this. Finally had time to take my truck in. I have the wastegate actuator rattle. Annoying but somewhat expected on this generation engine. The cam phaser issue is a much shorter duration and louder rattle. @NukeLife 's post is a prime example.
I think this is what mine is doing now. I can rev it up in park and it rattles like crazy on the deceleration of the engine. It makes the same rattle for about 1 minute on cold start, but it's not the violent clanking like in the first few seconds of the video.