I stumbled across this by accident, but it would seem to belong here. As some here probably already know, PlutoTV is a Paramount-owned video service known as FAST - Free Advertising Supported Streaming Television. It's all online and it's all free. There are no sign ins or sign ups required. 

And the menus are full of Beatle-related documentary specials. Just a few of the titles ought to illustrate the scope of what's there for the taking:.

-The Beatles In America
-The Beatles: Made on Merseyside
-The Beatles: In The Life
-How The Beatles Changed The World
-The Beatles: The Long & Winding Road
-The Beatles: In Washington DC
-Brian Epstein: Inside The Fifth Beatle
-The Beatles: Up Close & Personal
-The Beatles: Explosion

And that's just part of the list. A lot of what you'll be able to see depends on where you are. Those in the U.S. have access to most of the shows, while visitors from Canada have other options. If you have a VPN, you can pick either. 

Just search for "The Beatles." Here's where to find the links:

US

Canada