"Write about Dragons" is a video recording of one of the writing classes titled "Writing Science Fiction and Fantasy" that Brandon Sanderson teaches at BYU. He teaches the class every year, and frequently updates it with new material, and most of the lectures are online (spread across myriad Youtube channels). Here are several of the others:

* 2014 class lectures (via BYU English dept): https://www.youtube.com/playlist?list=PLRO9W1Nmh6clZP-IAhMeM...

* 2016 class lectures (via Camera Panda): http://brandonsanderson.com/2016-sanderson-lectures/

He also delivered lectures at JordanCon in 2010 and 2011. I frequently recommend his "description and viewpoint" lecture as the best tool for competent non-fiction writers to understand what separates the skill of fiction writing from non-fiction writing.

* JordanCon 2010: description and viewpoint https://www.youtube.com/playlist?list=PL3A1F631BCD668EDF

* JordanCon 2010: plotting https://www.youtube.com/playlist?list=PLB2AB4CCF96ECB552

* JordanCon 2011: sanderson's second law of magic systems https://www.youtube.com/playlist?list=PLF9F2E7291F6FBFEB

Brandon Sanderson is also one of the hosts on the weekly Writing Excuses podcast: http://writingexcuses.com/