I made this using Möbius transformations, applied to video recorded on a Ricoh Theta S camera. See http://elevr.com/spherical-video-editing-effects-with-mobius-transformations/ for more details on applying Möbius transformations to spherical video. If you're curious what the original video looked like, before I started messing with it, here's the raw footage: https://www.youtube.com/watch?v=ckwIeZRKm5Y