Amid confusion and angst about the new helmet-contact rule, the NFL is having daily dialogue about the application in preseason games, league sources told ESPN. The league will also assemble an updated video tutorial that will be distributed to game officials, coaches and players once the final preseason games are played and in time for teams preparing for their regular-season openers, according to sources. The helmet rule is expected to dominate a previously scheduled conference call Wednesday for an expanded discussion among league officials. News of the conference call was first reported by Pro Football Talk. The revised video will be prepared by Al Riveron, the league's vice president of officials, with assistance from other league executives. It will include proper and erroneous applications by game officials, which one source said has generated a "predictable hysteria" because it is the first time the new rule is being officiated. The rule that was expanded in May prohibits...