The Map Men video emphasizes that Yorkshire is currently the (historic) county that has a strong notion of identity. People from Yorkshire tend to identify themselves as such. And the Yorkshire accents are distinctive, not only to Britons, but even to non-Britons. (Think Ned Stark and Ygritte on Game of Thrones)
Patrick Stewart speaks quite often of his Yorkshire origin — Sir Patrick Stewart talks about growing up in Yorkshire - YouTube
But it’s worth pointing out that Britain has had very regional cultures for centuries. If you go back far enough, they were speaking different languages—Norn, Gaelic, and Scots in Scotland, Cumbrian in Northwestern England, Welsh in Wales, Cornish in Cornwall, Old Norse overlying the Northeast. And that’s not even considering that various dialects of English could be very different from each other.
The ethnic ancestry of people in various parts of Britain can be very different based on region too—Angles, Saxons, Jutes, Frisians, Danes, Norwegians, various kinds of British Celts, Scots and other Irish groups, Picts, etc. Even up to more modern times—heavy Irish settlement in Liverpool, heavy South Asian settlement in Bradford.
And on top of all that, British culture is loaded with stereotypes about what people from X place is like, whether it’s a region or a city or a neighborhood, like Scots, or Geordies or Scousers, or Mancs, or Yorkshiremen, or Welsh, or Cockneys, or whatever.
So if you are like me and have only a vague idea of what all these associations are about then you might not catch the full meaning when British people point out to each other where someone is from.
Four Yorkshiremen—
(Michael Palin actually is from Yorkshire, but Graham Chapman and John Cleese wrote this sketch before Monty Python was formed.)
Patrick Stewart demonstrating the Yorkshire dialect he grew up speaking. He often says that he learned English as a second language—
