These are downsampled version (640x360 24 fps) of the Peach
Open Movie "Big Buck Bunny" as a sequence of png files. They are

Copyright (C) 2008 Blender Foundation | peach.blender.org
Some Rights Reserved. Creative Commons Attribution 3.0 license.

http://creativecommons.org/licenses/by/3.0/ excepting logos
included in the film, including the Blender logo, the Peach
logo and the Creative Commons logo.