Report: NFL to revise teaching video on new helmet rule

The NFL will assemble an updated teaching video to be distributed to game officials for the new helmet-contact rule, sources told ESPN's Chris Mortensen.

Enforcement of the helmet rule will be discussed on a conference call Wednesday as teams prepare for their regular-season openers. Potential adjustments to be discussed could include limiting flagged hits to the top/crown of the helmet or implementing replay review as a safeguard, per Pro Football Talk's Mike Florio.

The league is looking at a "probable three-year" adjustment period for the new rule that was expanded upon in May, per Mortensen.

Under the new update, penalties can be assessed for plays in which players lower their helmets to establish linear body posture, have an unobstructed path to their opponent, or when contact was clearly avoidable and the player had other options.

Al Riveron, the NFL's vice president of officiating, will prepare the updated video with assistance from other league executives. It will include both proper and inaccurate applications by officials.

Related: Vikings' Zimmer: New helmet rule will 'cost some people some jobs'

The head-contact rule has caused confusion and frustration among coaches and players regarding its application in preseason games, as referees err on the side of caution before the regular season begins.