Here's what they say about Vault:
What is NHL Vault™?
NHL Vault™ is a monthly subscription offering post-game replays from a five-year game archive plus access to an extensive library of classic games dating back to the 1960s, all for the low price of $4.95 per month. It is free for all NHL GameCenter LIVE™ subscribers.
The five-year game archive includes full-length and condensed 10-15 minute replays of every game since the 2007-2008 season, including post-replays added nightly from the current season.* Sign up at nhl.com/vault
*Full-length replays from the current season are subject to in-market and national blackouts in the US and Canada. If the game was available to watch live on television in your local area, the full-length replay will become available 48-hours after game completion. All other games are available next day. There are no blackout regulations on condensed replays.
To see what teams are considered in-market and are therefore, unavailable to watch within 48-hours of game completion, pleasecheck your zip code.
Don't know if it works or not. GameCenter Live probably isn't as much of an out-of-market "necessity" as it would be full seasons where more games were unavailable nationally, but for only $50 and with a variety of options where I could watch it (Apple TV, Roku, iPad, iPhone, computer), I think it's worth a shot. If the quality is absolutely terrible, then I'll know not to waste more money next year. Hopefully it's at least as good as MLB's streaming service.