Links

There are some very nice and free videos. I'd say, use your CamStudio and record for your collection, while you can. You'll wake up tomorrow to find many clips gone or we'll have to pay for it. Download!
 For demonstration of working with Video please look at "Using Video Referencing" post.

Muybridge collection. Some of interest here and lots more on the Youtube.
Muybridge Jump. 
Muybridge Walk 1
Muybridge donkey walk
Horse walk cycle - outstanding work, rig and model.

Nice set of videos. Some of them are below, but there's more.
Walk cycle 1 athletic man
Walk cycle2  fat man
Walk cycle3  angry woman
Walk cycle 4 Large woman walk

Run cycle 1 Cartoony, expressive, energetic.
Very nice explanation of running  Must see.
Run cycle2 Wait till the end of the clip. Very nice front and side cycles. Note they are almost not jumping  at all. But we must exaggerate, right?
Run cycle 3 Powerful jogging in slow motion. Turn the sound off.
Run cycle 4 10K running. Plenty of up/down.
Overlapping action:
video 1
video 2

http://www.youtube.com/watch?v=rTp5tZ1lAP4&feature=related Excellent video of horses


Art Animation
Miniature Theatre  Very interesting short. Not much animation per se, but wonderful little gem.