While some episodes are unlocked and do not require a TV provider to watch, locked episodes on the HISTORY app and History.com can be viewed only after connecting to a TV provider that includes a TV package with HISTORY. If you do not have a supported TV provider and TV package, you will not be able to unlock all episodes of HISTORY in our apps and website at this time.
You can find out more here:
I don't have a TV provider. Can I subscribe directly to HISTORY?
What TV providers support the HISTORY app?
Why am I receiving a message that I am 'not authorized' to view videos?
If you are signed in with a TV provider that includes HISTORY in your TV package, but are still having trouble with the video player, we recommend you take the troubleshooting steps outlined here: HISTORY videos won't play. What should I do?