This Old House's Roger Cook - how to install rainwater collection :
Rainwater Harvesting System Installation -

Steve Fisher's Rainwater Collection
Part 1 - Walkthrough : http://www.vimeo.com/1303028
Part 2 - The Roof : http://www.vimeo.com/1309914
Part 3 - Pre-Storage Filtration and Plumbing : http://www.vimeo.com/1310414
Part 4 - Post-Cistern Sanitation and Pumping : http://www.vimeo.com/1289985

CCGC Rainwater Harvesting Part 1 - http://www.youtube.com/watch?v=i5eKzzZ5pkE
CCGC Rainwater Harvesting Part 2 - http://www.youtube.com/watch?v=hdMAL4TA2c4
CCGC Rainwater Harvesting Part 3 - http://www.youtube.com/watch?v=iSWq0hMFd3Q&feature=related

Preparedness 101 - Water Storage - http://www.youtube.com/watch?v=pw8J8_8V7jM
Preparedness 101 - Water storage pt2 - http://www.youtube.com/watch?v=FB1vrgYmp40

Innovative Rainwater Harvesting -
Using Rainwater in Rurak Areas -
L.A. Looks at Harvesting Rain Water with TreePeople -
Drinking Rainwater -
Solutions for Development: Rainwater Harvesting -
Small Urban Rainwater Harvesting System -