I learned this technique for "video citizen journalism" from Richard Hering in a workshop he did for our English for Activists class in Tokyo. Seems like a great tool for activists that can also be a great tool for learners. The key factors are immediacy, a clear simple structure, and low technical barriers: you use the video camera on your phone, a simple formula for organizing content, and no editing or effects. (See remoscope for a similarly direct approach.)
For developing communication skills, noticing how we communicate.