The training camp version runs for 5 episodes from the week before the first preseason game (maybe 2 weeks now there are only 3 preseason games) up through the last preseason game and roster cut downs to the 53.
The in-season version lasts I believe 8 episodes and follows the team from about the midpoint of the season through the end.
It’s certainly viewed as a distraction around the league but if no teams volunteer for it, the League can and will force one of the 3 teams (Bears, Broncos, Saints) to do it and may even end up forcing another to do the in-season edition.