There are two videos by a bestselling journalist and author that take you on an in depth but easy-to-do bootcamp learning how Scrivener works.
Along the way, he shows you some of his techniques, great ways of rethinking how you write as well as how you use Scrivener.
Pause and rewind as you need and rewatch them again and again as you learn more about how Scrivener works.
If you watch any videos on Scrivener, these should be the two you choose. They are each about 60-90 minutes long.