VANCOUVER, British Columbia — The NHL is expanding its video review process to a format that would have had the potential to alter two notable missed calls during the playoffs — though the rule changes come at a price.

The league’s general managers approved allowing coaches an unlimited number of video challenges for goalie interference, offside and an additional element of possible missed calls that would have resulted in a stoppage in play. On the downside, each coach’s challenge that proves unsuccessful will result in a minor penalty. A second unsuccessful challenge in the same game would result in a double minor.

The league also will have officials review major penalties to determine whether the call was accurate. Upon review, the referee would then have the option to reduce a major penalty to a minor.

Allowing stoppages in play to be reviewed comes after San Jose won Game 3 of the Western Conference final when officials missed a hand pass immediately before Erik Karlsson scored in overtimer. Under the new rule, the play would have been reviewed automatically because all plays are reviewed in the final minute of a game and overtime.

Allowing officials to review major penalties would have had the potential to change the complexion of Game 7 in a first-round series between Vegas and San Jose.