does anyone know if the Exploring Life, Music and Song VHS tape includes actual demonstrations of her playing style or just narrative about it?

I've never seen it, so I can't be sure. The description at Amazon.com would suggest that demonstrations are included:

Includes demonstration/performances of: On Top of Old Smoky, Motherless Child, Lay My Burden Down, True Believer, Water Is Wide/Gift of Heaven Medley, Sittin' Here in Limbo, Hit or Miss and Cool Water

It is very easy to get US stuff in the UK these days, and most DVD players will cope with every region.