It really is just a series of animations. It's basically a time lapse of drawing. You can look at how Henry from MinutePhysics does his videos[1] (and if you li

It really is just a series of animations. It's basically a time lapse of drawing. You can look at how Henry from MinutePhysics does his videos[1] (and if you like how this presentation is done, I highly recommend looking into MinutePhysics). These were probably done in something similar to flash. For open source programs, I'd probably look at Synfig[2] or Pencil2D[3]. [1] https://www.youtube.com/watch?v=GhZ3naSgJg4 https://www.youtube.com/watch?v=GhZ3naSgJg4 [2] http://synfig.org/ http://synfig.org/ [3] https://www.pencil2d.org/ https://www.pencil2d.org/