Ryan Connolly (Film Riot, etc.) is hosting some live classes/lectures/workshops on Creative Live. They last from 9am to 4pm (western time). There's one going on right now, and two more in the next two days.
https://www.creativelive.com/courses/guerilla-filmmaking-ryan-connolly
https://www.creativelive.com/courses/guerilla-filmmaking-ryan-connolly