Jeffrey on YouTube’s new terms:
As much as we might like to use YouTube as a backup repository for every video we own and many we do not, Google is under no obligation to serve it or store it
Says who? Google.
YouTube may terminate your access, or your Google account’s access to all or part of the service if YouTube believes, in its sole discretion, that provision of the service to you is no longer commercially viable
In other words, if Google can’t make money off your videos then it is not under obligation to store your videos.