I'm reliably informed that this works...
If you sign up for a free account with NHL TV here:
https://account.nhl.com/ui/pub/CreateProfile?lang=en&returnUrl=https%3A%2F%2Fwww.nhl.com%2Fnews%2Fnhltv-free-games%2Fc-291516040
you get access to the "Free Game of the Day" (live and on-demand) and...