I'd expect he's just attached a string to a phone case, and whirled it. If there were any stability issue a teeny tail-vane on one end/side of the phone would h

I'd expect he's just attached a string to a phone case, and whirled it. If there were any stability issue a teeny tail-vane on one end/side of the phone would hold it in its orientation. I keep looking at this and something is scratching at my mind about rotoscopes, time slicing and rolling shutters, and how this could be used for something, but I can't quite put my finger on what. Edit: https://www.youtube.com/watch?v=EnrwrwMfNSs https://www.youtube.com/watch?v=EnrwrwMfNSs is along the lines of where my thought was going. You could make 360 video with this method, potentially extract high resolution spatial information too.