Each video is cyclic with 10 seconds (250 frames) period, so you can have a seamless loop by playing it repeatedly.
|pixel aspect ratio (PAR)||1:1|
|display aspect ratio (DAR)||4:3|
All the videos below and the After Effects project are licensed under CC0 1.0 Universal, a.k.a. Public Domain Dedication.
Previews and download links
Adobe After Effects CS3 project