It doesn't really matter. Every team in the league has access to all of the footage they'd ever need to study an opponent.
Also, there's chatter among fans that teams will come up with specified game plans to beat the opposition. That doesn't really happen much in the NHL, until the playoffs hit. Teams barely practice at this point in the season and they certainly don't have the time to break down opponents in any detailed manner when they're playing every other night. This isn't the NFL where you get a week to prepare for your next opponent.
Teams focus on themselves and their own structures, and they'll get a cliff notes version of what the other team excels at or struggles with. Then they play the game, with their systems in place, and try to make minor adjustments depending on that particular game.