@TheMorrigan do you think it could be this one? It's title is slightly different - Walking Through Time.
My beloved house in Hallsands, Devon sits on a finger of that type of rock (I think) . For over 50 years, I've watched these impenetrable beasts gradually succumb to the pounding of the sea.
Much of what you see in this video has finally lost it's strength, and stratified (?) into easily breakable slices.
The path to the cottage fell into the sea in 2017, and I'm heartbroken.
But comforted that it's going to last longer than the Tories.