I forgot my username and/or password to watch videos. What do I do? If you forgot any of your sign in information, please contact your TV provider. Related articles I lost my HISTORY Vault password. How do I recover or change it? Do I have to sign in to watch some videos? How do I cancel a subscription purchased on historyvault.com? Where do I get my TV provider information? I’m having trouble signing in to HISTORY Vault. What should I do?