There first name to come to mind is Michael La Ronn.
I didn’t think of him earlier before because in my mind I associate him with his videos on Scrivener, Ulysses and Vellum and self-publishing in general, not plotting. I looked back at his YouTube channel and he does have many videos on writing craft. I’ll have to add those to my Watch Later queue.
He is well known on the Alliance of Independent Authors, as co-host of the ALLi Q&A podcast and regularly posts videos on self-publishing topics and writing craft on his YouTube channel: Author Level Up
Email: info@authorlevelup.com
His Websites:
https://www.michaellaronn.com/press/
(Edit: Slight formatting change. The second onebox was being suppressed too. They need a line between them apparently. The content seems to be the same on both sites so it may just be that both domains point to the same place.)