By Bill Bradley, contributing editor
What are the new rules this season, including the ones involving player health and safety?
The NFL has produced an 11-plus minute video aimed at players that explains the majority of the rule changes and the points of emphasis for the 2014 season.
The presentation was released to the media earlier this week.
NFL executive vice president of football operations Troy Vincent and vice president of officiating Dean Blandino hosted the video, which again points out that the NFL will have "zero tolerance" for unsportsmanlike conduct.
The key rule changes mentioned in the video were a.) protection for the defensive players in blocks below the waist; b.) stopping the game clock on a quarterback sack with more than two minutes left in the half; c.) several changes in the instant replay system, including consulting with the NFL command center in New York; d.) experimenting with a longer extra-point during the first two weeks of the preseason.