Here are web sites with videos and animations.

First, serious stuff.....

Name
URL
Brief Description
Green Porn (Isabella Rossilini)
http://www.sundancechannel.com/greenporno/video/
Sundance Channel
John Kyrk
http://www.johnkyrk.com
Animations on various topics
Cells Alive!
http://www.cellsalive.com
Images and animations
Stages of mitosis
http://www.hybridmedicalanimation.com/work/animation/the-stages-of-mitosis/
Animations
Inner Life of the Cell
http://multimedia.mcb.harvard.edu/
BioVisions Project
HHMI
http://www.hhmi.org/biointeractive/dna/animations.html
DNA animations
Top Ten Amazing Biology Videos
http://www.wired.com/wiredscience/2008/11/top-10-amazin-1/
Wired Science
Reef Videos
http://www.reefvid.org/
Free coral reef clips
BozemanBiology videos
http://www.bozemanscience.com/science-videos/
Amazing videos about lots of topics
Dolan Learning Center
http://www.dnalc.org/resources/animations/
DNA animations
Khan Academy
http://www.khanacademy.org/
Videos and practice lessons

http://www.sumanasinc.com/

And then, just for fun....

Name
URL
Brief Description
Green Porn (Isabella Rossilini)
http://www.sundancechannel.com/greenporno/video/
Sundance Channel
Sliding Pandas
http://www.care2.com/causes/hilarious-sliding-pandas-video.html
oh so cute panda bears, sliding down ramp
Baby eagle hatching
http://www.youtube.com/watch?v=ECLbBcZN8tQ
From Iowa - one baby eagle in next, second hatches
Cheetah
http://www.youtube.com/watch?v=u3kTZ_K3ytQ
Cheetah running