Act Beyond (formerly called Mission to Unreached Peoples) has a new set of videos about launching Church Planting (Disciple Making) Movements. See this 5+ minute video explaining why it is crucial to start movements

act beyond v.2 1280×720 1280×720 from Act Beyond on Vimeo.

The longer 7+ minute video can be found on their new website,

http://www.beyond.org

and deals with some of the common questions about starting movements.