First-ever estimate of total bacteria on earth
http://www.sdearthtimes.com/et0998/et0998s8.html

Here is an example that gives a great perspective on the scale of things, although not a video, but you get my point :
Molecular Expressions: Science, Optics and You - Secret Worlds: The Universe Within
http://www.micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/index.html


A writer/Bio-Dynamic farmer, Allan Balliett is writing the story for Acres USA, doing an interview with Charles Mann ("1491")
Acres U.S.A. -- A Voice for Eco-Agriculture
http://www.acresusa.com/magazines/magazine.htm


Ron Larson's TP story
http://www.solartoday.org/2006/nov_dec06/Chairs_CornerND06.pdf

Erich J. Knight