The Vault streaming: where to watch online?
Currently you are able to watch "The Vault" streaming on The Roku Channel for free with ads or buy it as download on Amazon Video, Apple TV, Fandango At Home. It is also possible to rent "The Vault" on Amazon Video, Apple TV, Fandango At Home, Spectrum On Demand, Plex online
You can also stream the title for free on Hoopla.