original video recorded at 120fps 1920×1080

original video 4x slower (30fps)

original video 8x slower (15fps)

video transformed to 240fps using optical flow then slowed down 8x (30fps)

original video 16x slower (7.5fps)

video transformed to 240fps using optical flow then slowed down 16x (15fps)

video transformed to 240fps using optical flow then slowed down 8x (30fps) then optical flow applied again (60 fps) then slowed 2x for net result of 16x slower @ 30fps