DESCRIPTION:
Song by Hanna Hirsch ( http://www.releasethebats.com/rtb40.html / http://open.spotify.com/album/4L5wUyVJtnf4fnCSjATzV5)
Original video by some unknown (presumably) french person ( http://www.youtube.com/watch?v=DimWaNc5bGA )
Which only leaves crude time-remapping, by me.

Software credits:
Video editing in fabulous Blender - which doesn't have any formal functionality for this, but it's easily done by just animating the "start" parameter of an image sequence. Not necessarily easy on Blender's part, since crashes every few minutes bacame an expected part of the workflow.

Also, Downloadhelper for Firefox to pluck the video from youtube, and fabulous Virtualdub to convert into image sequence.